certificate authority (CA)

(CA also stands for conditional access, a term used in DTV.) A certificate authority (CA) is an authority in a network that issues and manages security credentials and public keys for message encryption.

(CA also stands for conditional access, a term used in DTV.)

A certificate authority (CA) is an authority in a network that issues and manages security credentials and public keys for message encryption. As part of a public key infrastructure (PKI), a CA checks with a registration authority (RA) to verify information provided by the requestor of a digital certificate. If the RA verifies the requestor's information, the CA can then issue a certificate.

Depending on the public key infrastructure implementation, the certificate includes the owner's public key, the expiration date of the certificate, the owner's name, and other information about the public key owner.

This was first published in June 2007

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