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Certificate Authority
<cryptography, body> (CA or "Trusted Third Party") An entity
(typically a company) that issues digital certificates to
other entities (organisations or individuals) to allow them to
prove their identity to others. A Certificate Authority might
be an external company such as VeriSign that offers digital
certificate services or they might be an internal organisation
such as a corporate MIS department. The Certificate
Authority's chief function is to verify the identity of
entities and issue digital certificates attesting to that
identity.
The process uses public key cryptography to create a
"network of trust". If I want to prove my identity to you, I
ask a CA (who you trust to have verified my identity) to
encrypt a hash of my signed key with their private key.
Then you can use the CA's public key to decrypt the hash and
compare it with a hash you calculate yourself. Hashes are
used to decrease the amount of data that needs to be
transmitted. The hash function must be cryptographically
strong, e.g. MD5.
http://home.netscape.com/comprod/server_central/support/faq/certificate_faq.html#11.
(1998-03-30)
Try this search on OneLook / Google
Nearby terms:
CERN « CERNLIB « CERT « Certificate Authority » CESP » CESSL » cextract
This article was derived from the Free Online Dictionary of Computers and is available under ther terms of the GNU Free Documentation License.
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