X.509

X.509 - This term refers to an information technology standard that was first developed by the International Telecommunications Union (ITU), and later modified by the Internet Engineering Task Force (IETF).   The standard concerns the definition of a record in a database that is used to store public key certificates for access through a PKI.   Although the format is a standard, it has been shown to be capable of many interpretations by different manufacturers.   Some of the information in a certificate includes the owner's/controller's identity and the identity of the Trusted Authority that vouches for them (or their own identity if they are issuing certificates for themselves (as a root authority).

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Artic Soft, 08 August 2011 08:27:18, http://www.articsoft.com/it_security.htm