Certification Expiration and Revocation List

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Certification Expiration and Revocation List:

When a certificate is created, it is stamped with Valid From and Valid To dates. The interim period between these dates is the cycle of time the certificate and key pairs are valid. Once a certificate’s validity period has expired, it must be either renewed or destroyed.

Certification Revocation List: The X.509 standard mandates CAs to publish CRLs. The basic information contained a CRL is the revocation status of certificates that the CA manages.

There are several variations of a revocation list:

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