<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE chapter SYSTEM "chapter.dtd">

<chapter>
  <header>
    <copyright>
      <year>2015</year>
      <year>2020</year>
      <holder>Ericsson AB, All Rights Reserved</holder>
    </copyright>
    <legalnotice>
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.

  The Initial Developer of the Original Code is Ericsson AB.
    </legalnotice>

    <title>Standards Compliance</title>
    <prepared>OTP team</prepared>
    <docno></docno>
    <date>2019-03-20</date>
    <rev>A</rev>
    <file>standards_compliance.xml</file>
  </header>

  <section>
    <title>Purpose</title>
    <p>This section describes the current state of standards compliance of the ssl application.</p>
  </section>

  <section>
    <title>Common (pre TLS 1.3)</title>
    <list type="bulleted">
      <item>For security reasons RSA key exchange cipher suites are no longer supported by default,
      but can be configured. (OTP 21)
      </item>
      <item>For security reasons DES cipher suites are no longer supported by default,
      but can be configured. (OTP 20)
      </item>
      <item>For security reasons 3DES cipher suites are no longer supported by default,
      but can be configured. (OTP 21)
      </item>
      <item>Renegotiation Indication Extension <url href="http://www.ietf.org/rfc/rfc5746.txt">RFC 5746</url> is supported
      </item>
      <item>Ephemeral Diffie-Hellman cipher suites are supported,
      but not Diffie Hellman Certificates cipher suites.
      </item>
      <item>Elliptic Curve cipher suites are supported if the Crypto
      application supports it and named curves are used.
      </item>
      <item>Export cipher suites are not supported as the
      U.S. lifted its export restrictions in early 2000.
      </item>
      <item>IDEA cipher suites are not supported as they have
      become deprecated by the TLS 1.2 specification so it is not
      motivated to implement them.
      </item>
      <item>Compression is not supported.
      </item>
    </list>
  </section>

  <section>
    <title>Common</title>
    <list type="bulleted">
      <item>CRL validation is supported.</item>
      <item>Policy certificate extensions are not supported.</item>
      <item>'Server Name Indication' extension
      (<url href="http://www.ietf.org/rfc/rfc6066.txt">RFC 6066</url>) is supported.</item>
      <item>Application Layer Protocol Negotiation (ALPN) and its successor Next Protocol Negotiation (NPN) are supported. </item>
      <item>It is possible to use Pre-Shared Key (PSK) and Secure Remote Password (SRP)
      cipher suites, but they are not enabled by default.
      </item>
    </list>
  </section>


  <section>
    <title>SSL 2.0</title>
    <p>For security reasons SSL-2.0 is not supported. Interoperability with SSL-2.0 enabled clients dropped. (OTP 21)</p>
  </section>

  <section>
    <title>SSL 3.0</title>
    <p>For security reasons SSL-3.0 is no longer supported at all. (OTP 23) </p>
    <p>For security reasons SSL-3.0 is no longer supported by default, but can be configured. (OTP 19)</p>
  </section>

  <section>
    <title>TLS 1.0</title>
    <p>For security reasons TLS-1.0 is no longer supported by default, but can be configured. (OTP 22)</p>
  </section>

  <section>
    <title>TLS 1.1</title>
    <p>For security reasons TLS-1.1 is no longer supported by default, but can be configured. (OTP 22)</p>
  </section>

  <section>
    <title>TLS 1.2</title>
    <p>Supported</p>
  </section>

  <section>
    <title>DTLS 1.0</title>
    <p>For security reasons DTLS-1.0 (based on TLS 1.1) is no longer supported by default, but can be configured. (OTP 22)</p>
  </section>

  <section>
    <title>DTLS 1.2</title>
    <p>Supported (based on TLS 1.2)</p>
  </section>

  <section>
    <title>DTLS 1.3</title>
    <p>Not yet supported</p>
  </section>

  <section>
    <title>TLS 1.3</title>
    <p>OTP-22 introduces support for TLS 1.3.
    The current implementation supports a selective set of cryptographic algorithms:</p>
    <list type="bulleted">
      <item>Key Exchange: ECDHE</item>
      <item>Groups: all standard groups supported for the Diffie-Hellman key exchange</item>
      <item>Ciphers: all cipher suites are supported</item>
      <item>Signature Algorithms: All algorithms form RFC 8446</item>
      <item>Certificates: RSA and ECDSA keys</item>
    </list>
    <p>Other notable features:</p>
    <list type="bulleted">
      <item>PSK and session resumption is supported (stateful and stateless tickets)</item>
      <item>Anti-replay protection using Bloom-filters with stateless tickets</item>
      <item>Early data and 0-RTT not supported</item>
      <item>Key and Initialization Vector Update is supported</item>
    </list>
    <p>For more detailed information see the
    <seeguide marker="#soc_table">Standards Compliance</seeguide> below.</p>

    <p> The following table describes the current state of standards compliance for TLS 1.3.</p>
    <p>(<em>C</em> = Compliant, <em>NC</em> = Non-Compliant, <em>PC</em> = Partially-Compliant,
    <em>NA</em> = Not Applicable)</p>
    <marker id="soc_table"/>
    <table>
      <row>
        <cell align="left" valign="middle"><em>Section</em></cell>
        <cell align="left" valign="middle"><em>Feature</em></cell>
	<cell align="left" valign="middle"><em>State</em></cell>
	<cell align="left" valign="middle"><em>Since</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-1.2">
	    1.3. Updates Affecting TLS 1.2
	  </url>
	</cell>
        <cell align="left" valign="middle"></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">Version downgrade protection mechanism</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">RSASSA-PSS signature schemes</cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>23</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">supported_versions (ClientHello) extension</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signature_algorithms_cert extension</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section/2">
	    2. Protocol Overview
	  </url>
	</cell>
        <cell align="left" valign="middle"></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">(EC)DHE</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">PSK-only</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">PSK with (EC)DHE</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-2.1">
	    2.1. Incorrect DHE share
	  </url>
	</cell>
        <cell align="left" valign="middle">HelloRetryRequest</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-2.2">
	    2.2. Resumption and Pre-Shared Key (PSK)
	  </url>
	</cell>
        <cell align="left" valign="middle"></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-2.3">
	    2.3. 0-RTT Data
	  </url>
	</cell>
        <cell align="left" valign="middle"></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.1.1">
	    4.1.1. Cryptographic Negotiation
	  </url>
	</cell>
        <cell align="left" valign="middle"></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">supported_groups extension</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signature_algorithms extension</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">pre_shared_key extension</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.1.2">
	    4.1.2. Client Hello
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
     <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">server_name (RFC6066)</cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">max_fragment_length (RFC6066)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23.0</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">status_request (RFC6066)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">supported_groups (RFC7919)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signature_algorithms (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">use_srtp (RFC5764)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">heartbeat (RFC6520)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">application_layer_protocol_negotiation (RFC7301)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signed_certificate_timestamp (RFC6962)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">client_certificate_type (RFC7250)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">server_certificate_type (RFC7250)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">padding (RFC7685)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">key_share (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">pre_shared_key (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">psk_key_exchange_modes (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">early_data (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">cookie (RFC8446) </cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">supported_versions (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">certificate_authorities (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">oid_filters (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">post_handshake_auth (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signature_algorithms_cert (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">server_name (RFC6066)</cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">max_fragment_length (RFC6066)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23.0</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">status_request (RFC6066)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">supported_groups (RFC7919)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signature_algorithms (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">use_srtp (RFC5764)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">heartbeat (RFC6520)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">application_layer_protocol_negotiation (RFC7301)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signed_certificate_timestamp (RFC6962)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">client_certificate_type (RFC7250)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">server_certificate_type (RFC7250)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">padding (RFC7685)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">key_share (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">pre_shared_key (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">psk_key_exchange_modes (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">early_data (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">cookie (RFC8446) </cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">supported_versions (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">certificate_authorities (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">oid_filters (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">post_handshake_auth (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signature_algorithms_cert (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.1.3">
	    4.1.3. Server Hello
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">Version downgrade protection</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">key_share (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">pre_shared_key (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">supported_versions (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">Version downgrade protection</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">key_share (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">pre_shared_key (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">supported_versions (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.1.4">
	    4.1.4. Hello Retry Request
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">key_share (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">cookie (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">supported_versions (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.2.1">
	    4.2.1. Supported Versions
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.2.2">
	    4.2.2. Cookie
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23.1</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.2.3">
	    4.2.3. Signature Algorithms
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pkcs1_sha256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pkcs1_sha384</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pkcs1_sha512</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ecdsa_secp256r1_sha256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ecdsa_secp384r1_sha384</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ecdsa_secp521r1_sha512</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pss_rsae_sha256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pss_rsae_sha384</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pss_rsae_sha512</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ed25519</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ed448</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pss_pss_sha256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pss_pss_sha384</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pss_pss_sha512</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pkcs1_sha1</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ecdsa_sha1</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pkcs1_sha256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pkcs1_sha384</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pkcs1_sha512</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ecdsa_secp256r1_sha256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ecdsa_secp384r1_sha384</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ecdsa_secp521r1_sha512</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pss_rsae_sha256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pss_rsae_sha384</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pss_rsae_sha512</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ed25519</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ed448</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pss_pss_sha256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pss_pss_sha384</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pss_pss_sha512</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">rsa_pkcs1_sha1</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ecdsa_sha1</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.2.4">
	    4.2.4. Certificate Authorities
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"><em></em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.2.5">
	    4.2.5. OID Filters
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"><em></em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.2.6">
	    4.2.6. Post-Handshake Client Authentication
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"><em></em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.2.7">
	    4.2.7. Supported Groups
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">secp256r1</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">secp384r1</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">secp521r1</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">x25519</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">x448</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ffdhe2048</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ffdhe3072</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ffdhe4096</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ffdhe6144</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ffdhe8192</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">secp256r1</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">secp384r1</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">secp521r1</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">x25519</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">x448</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ffdhe2048</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ffdhe3072</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ffdhe4096</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ffdhe6144</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">ffdhe8192</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.2.8">
	    4.2.8. Key Share
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.2.9">
	    4.2.9. Pre-Shared Key Exchange Modes
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.2.10">
	    4.2.10. Early Data Indication
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"><em></em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.2.11">
	    4.2.11. Pre-Shared Key Extension
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.2.11.1">
	    4.2.11.1. Ticket Age
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.2.11.2">
	    4.2.11.2. PSK Binder
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.2.11.3">
	    4.2.11.3. Processing Order
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"><em></em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.3.1">
	    4.3.1. Encrypted Extensions
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">server_name (RFC6066)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">max_fragment_length (RFC6066)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23.0</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">supported_groups (RFC7919)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">use_srtp (RFC5764)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">heartbeat (RFC6520)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">application_layer_protocol_negotiation (RFC7301)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">client_certificate_type (RFC7250)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">server_certificate_type (RFC7250)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">early_data (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">supported_versions (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>

      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">server_name (RFC6066)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">max_fragment_length (RFC6066)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23.0</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">supported_groups (RFC7919)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">use_srtp (RFC5764)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">heartbeat (RFC6520)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">application_layer_protocol_negotiation (RFC7301)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">client_certificate_type (RFC7250)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">server_certificate_type (RFC7250)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">early_data (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">supported_versions (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.3.2">
	    4.3.2. Certificate Request
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">status_request (RFC6066)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signature_algorithms (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signed_certificate_timestamp (RFC6962)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">certificate_authorities (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">oid_filters (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signature_algorithms_cert (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">status_request (RFC6066)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signature_algorithms (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signed_certificate_timestamp (RFC6962)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">certificate_authorities (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">oid_filters (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signature_algorithms_cert (RFC8446)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.4.1">
	    4.4.1. The Transcript Hash
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.4.2">
	    4.4.2. Certificate
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">status_request (RFC6066)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signed_certificate_timestamp (RFC6962)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>

      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">status_request (RFC6066)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">signed_certificate_timestamp (RFC6962)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.4.2.1">
	    4.4.2.1. OCSP Status and SCT Extensions
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"><em></em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.4.2.2">
	    4.4.2.2. Server Certificate Selection
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">The certificate type MUST be X.509v3, unless explicitly
	negotiated otherwise</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">The server's end-entity certificate's public key (and associated
	restrictions) MUST be compatible with the selected authentication
	algorithm from the client's "signature_algorithms" extension
	(currently RSA, ECDSA, or EdDSA).</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">The certificate MUST allow the key to be used for signing
	with a signature scheme indicated in the client's "signature_algorithms"/"signature_algorithms_cert"
	extensions</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">The "server_name" and "certificate_authorities"
	extensions are used to guide certificate selection.  As servers
	MAY require the presence of the "server_name" extension, clients
	SHOULD send this extension, when applicable.</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.4.2.3">
	    4.4.2.3. Client Certificate Selection
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">The certificate type MUST be X.509v3, unless explicitly
	negotiated otherwise</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">If the "certificate_authorities" extension in the
	CertificateRequest message was present, at least one of the
	certificates in the certificate chain SHOULD be issued by one of
	the listed CAs.</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"><em></em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">The certificates MUST be signed using an acceptable signature
	algorithm</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">If the CertificateRequest message contained a non-empty
	"oid_filters" extension, the end-entity certificate MUST match the
	extension OIDs that are recognized by the client</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"><em></em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.4.2.4">
	    4.4.2.4. Receiving a Certificate Message
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.4.3">
	    4.4.3. Certificate Verify
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.4.4">
	    4.4.4. Finished
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.5">
	    4.5. End of Early Data
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"><em></em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.6.1">
	    4.6.1. New Session Ticket Message
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">early_data (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>

      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">early_data (RFC8446)</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.6.2">
	    4.6.2. Post-Handshake Authentication
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"><em></em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-4.6.3">
	    4.6.3. Key and Initialization Vector Update
	  </url>
	</cell>
        <cell align="left" valign="middle"><em>Client</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.3</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Server</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.3</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-5.1">
	    5.1. Record Layer
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">MUST NOT be interleaved with other record types</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">MUST NOT span key changes</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">MUST NOT send zero-length fragments</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">Alert messages MUST NOT be fragmented</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-5.2">
	    5.2. Record Payload Protection
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-5.3">
	    5.3. Per-Record Nonce
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-5.4">
	    5.4. Record Padding
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">MAY choose to pad</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">MUST NOT send Handshake and Alert records that have a zero-length TLSInnerPlaintext.content</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">The padding sent is automatically verified</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-5.5">
	    5.5. Limits on Key Usage
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.3</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-6.1">
	    6.1. Closure Alerts
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"><em></em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">close_notify</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">user_cancelled</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-6.2">
	    6.2. Error Alerts
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-7.1">
	    7.1. Key Schedule
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-7.2">
	    7.2. Updating Traffic Secrets
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-7.3">
	    7.3. Traffic Key Calculation
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-7.5">
	    7.5. Exporters
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"><em></em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section/8">
	    8. 0-RTT and Anti-Replay
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-8.1">
	    8.1. Single-Use Tickets
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-8.2">
	    8.2. Client Hello Recording
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-8.3">
	    8.3. Freshness Checks
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-9.1">
	    9.1. Mandatory-to-Implement Cipher Suites
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">MUST implement the TLS_AES_128_GCM_SHA256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">SHOULD implement the TLS_AES_256_GCM_SHA384</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">SHOULD implement the TLS_CHACHA20_POLY1305_SHA256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Digital signatures</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">MUST support rsa_pkcs1_sha256 (for certificates)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">MUST support rsa_pss_rsae_sha256 (for CertificateVerify and certificates)</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">MUST support ecdsa_secp256r1_sha256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>Key Exchange</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">MUST support key exchange with secp256r1</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">SHOULD support key exchange with X25519</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-9.2">
	    9.2. Mandatory-to-Implement Extensions
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">Supported Versions</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">Cookie</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">Signature Algorithms</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">Signature Algorithms Certificate</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">Negotiated Groups</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">Key Share</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">Server Name Indication</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>

      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>MUST send and use these extensions</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">"supported_versions" is REQUIRED for ClientHello, ServerHello and HelloRetryRequest</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">"signature_algorithms" is REQUIRED for certificate authentication</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">"supported_groups" is REQUIRED for ClientHello messages using (EC)DHE key exchange</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">"key_share" is REQUIRED for (EC)DHE key exchange</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">"pre_shared_key" is REQUIRED for PSK key agreement</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">"psk_key_exchange_modes" is REQUIRED for PSK key agreement</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>TLS 1.3 ClientHello</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">If not containing a "pre_shared_key" extension, it MUST contain both a "signature_algorithms" extension and a "supported_groups" extension.</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">If containing a "supported_groups" extension, it MUST also contain a "key_share" extension, and vice versa.  An empty KeyShare.client_shares vector is permitted.</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>TLS 1.3 ServerHello</em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">MUST support the use of the "server_name" extension</cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-9.3">
	    9.3. Protocol Invariants
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle"><em>MUST correctly handle extensible fields</em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">A client sending a ClientHello MUST support all parameters
	advertised in it. Otherwise, the server may fail to interoperate by selecting one of those parameters.</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">A server receiving a ClientHello MUST correctly ignore all
	unrecognized cipher suites, extensions, and other parameters. Otherwise, it may fail to
	interoperate with newer clients. In TLS 1.3, a client receiving a CertificateRequest or
	NewSessionTicket MUST also ignore all unrecognized extensions.</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.1</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">A middlebox which terminates a TLS connection MUST behave as a
	compliant TLS server</cell>
	<cell align="left" valign="middle"><em>NA</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">A middlebox which forwards ClientHello parameters it does not
	understand MUST NOT process any messages beyond that ClientHello. It MUST forward all subsequent
	traffic unmodified.  Otherwise, it may fail to interoperate with newer clients and servers.</cell>
	<cell align="left" valign="middle"><em>NA</em></cell>
	<cell align="left" valign="middle"></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-B.4">
	    B.4. Cipher Suites
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">TLS_AES_128_GCM_SHA256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">TLS_AES_256_GCM_SHA384</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">TLS_CHACHA20_POLY1305_SHA256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">TLS_AES_128_CCM_SHA256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>
      <row>
        <cell align="left" valign="middle"></cell>
        <cell align="left" valign="middle">TLS_AES_128_CCM_8_SHA256</cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-C.1">
	    C.1. Random Number Generation and Seeding
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-C.2">
	    C.2. Certificates and Authentication
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-C.3">
	    C.3. Implementation Pitfalls
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>PC</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-C.4">
	    C.4. Client Tracking Prevention
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-C.5">
	    C.5. Unauthenticated Operation
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-D.1">
	    D.1. Negotiating with an Older Server
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22.2</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-D.2">
	    D.2. Negotiating with an Older Client
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-D.3">
	    D.3. 0-RTT Backward Compatibility
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>NC</em></cell>
	<cell align="left" valign="middle"><em></em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-D.4">
	    D.4. Middlebox Compatibility Mode
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>23</em></cell>
      </row>

      <row>
        <cell align="left" valign="middle">
	  <url href="https://tools.ietf.org/html/rfc8446#section-D.5">
	    D.5. Security Restrictions Related to Backward Compatibility
	  </url>
	</cell>
        <cell align="left" valign="middle"><em></em></cell>
	<cell align="left" valign="middle"><em>C</em></cell>
	<cell align="left" valign="middle"><em>22</em></cell>
      </row>

      <tcaption>Standards Compliance</tcaption>
    </table>

  </section>

</chapter>
