What is CRL (certificate revocation list)?

A Certificate Revocation List (CRL) is a list of digital certificates. CRL has been repudiated by the issuing Certificate Authority (CA) before their booked termination date. CRLs are a kind of blacklist and are utilized by different endpoints, incorporating Web browsers, to confirm that the certificate is substantial and reliable.
Each entry in a Certificate Revocation List incorporates the serial number of the denied certificate and the revocation date. The CRL record is signed by the Certificate Authority to prevent tampering.