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X509 is a standard for defining a DigitalCertificate. It is the signing system used for SSL.

Some useful documentation on X509 certificates: http://java.sun.com/products/jdk/1.2/docs/guide/security/cert3.html.

Some information about how to implement X509

This is also just an interesting read to find out why X509 is such a bizarre standard

Things that use X509 certificates:

  • Various code-signing schemes, such as signed Java ARchives, and Microsoft Authenticode.
  • Various secure E-Mail standards, such as PEM and S/MIME.
  • E-Commerce protocols, such as SET.
  • MicrosoftWindows

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