High Quality Content by WIKIPEDIA articles! An Authority revocation list (ARL) is a form of certificate revocation list (CRL) but containing certificates issued to Certifying Authorities, contrary to CRL which contain revoked end-entity certificates. In the operation of some cryptosystems, usually public key infrastructures (PKIs), a certificate revocation list (CRL) is a list of certificates (or more specifically, a list of serial numbers for certificates) that have been revoked or are no longer valid, and therefore should not be relied upon.A CRL is generated and published periodically, after a clearly defined timeframe. A CRL can also be published immediately after a certificate has been revoked. The CRL is always issued by the CA which issues the corresponding certificates. All CRLs have a lifetime during which they are valid; this timeframe is often 24 hours or less. During a CRL's validity period, it may be consulted by a PKI-enabled application to verify a certificate prior to use.

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