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Search Results: "x.509"

X.509

(n.) A widely used standard for defining digital certificates.  X.509 (Version 1) was first issued in 1988 as a part of the ITU X.500 Directory Services standard.

http://www.webopedia.com/TERM/X/X_509.html
digital certificate

An attachment to an electronic message used for security purposes. The most common use of a digital certificate is to verify that a user sending a message is who he or she claims to be, and to provide the receiver with the means to encode a reply.

http://www.webopedia.com/TERM/D/digital_certificate.html