# Uses of Interface
java.security.cert.X509Extension

Packages that use X509Extension
Package
Description
java.security.cert
Provides classes and interfaces for parsing and managing certificates, certificate revocation lists (CRLs), and certification paths.

- ## Uses of X509Extension in java.security.cert

  Classes in java.security.cert that implement X509Extension
  Modifier and Type
  Class
  Description
  `class`
  `X509Certificate`
  Abstract class for X.509 certificates.
  `class`
  `X509CRL`
  Abstract class for an X.509 Certificate Revocation List (CRL).
  `class`
  `X509CRLEntry`
  Abstract class for a revoked certificate in a CRL (Certificate Revocation List).