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CISSP All-in-One Exam Guide, Eighth Edition, 8th Edition by Fernando Maymi, Shon Harris

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Certificates

One of the most important pieces of a PKI is its digital certificate. A certificate is the mechanism used to associate a public key with a collection of components in a manner that is sufficient to uniquely identify the claimed owner. The standard for how the CA creates the certificate is X.509, which dictates the different fields used in the certificate and the valid values that can populate those fields. The most commonly used version is 3 of this standard, which is often denoted as X.509v3. Many cryptographic protocols use this type of certificate, including SSL.

The certificate includes the serial number, version number, identity information, algorithm information, lifetime dates, and the signature of the issuing authority, ...

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