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Certificate Authority (CA)
A trusted entity that issues a certificate after verifying the identity of the person or program or
process that the certificate is intended to identify. A CA also renews and revokes certificates
and, at regular intervals, generates a list of revoked certificates.
Certificate Extension
An extension of the
X.509
standard that lets the certificate hold additional identifying
information.
Certificate Request
A request containing a user’s public key, distinguished name (DN), and other data that is
submitted to a
Certificate Authority (CA)
in order to receive a certificate.
Certificate Revocation List (CRL)
CRLs list certificates that have been revoked by a particular CA. Revocation lists are vital
when certificates have been stolen, for example.
Certification Path
A specified sequence of issued certificates necessary for the user to get their key.
Confidentiality
Keeping secret data from unauthorized eyes.
Content Filtering
A filter that screens out data by checking (for example) URLs or key words.
Coordinated Universal Time (UTC)
The international time standard is called Coordinated Universal Time or, more commonly,
UTC, for “Universal Time, Coordinated”. This standard has been in effect since being decided
upon in 1972 by worldwide representatives within the International Telecommunication Union.
UTC is maintained by the Bureau International de l’Heure (BIPM), which forms the basis of a
coordinated dissemination of standard frequencies and time signals. The acronyms UTC and
BIPM are each a compromise among all the participating nations.
CR
See
Certificate Request
Credential(s)
Much like a photo ID or birth certificate, electronic credentials are recognized as proof of a
party's identity and security level. Examples: certificate, logon ID, secure ID, and so forth.
Cross-Certificate
Two or more Certificate Authorities (CAs) that issue certificates (cross-certificates) to
establish a trust relationship between themselves.
Cryptography
See
Encryption
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