Security
CRL
Abbreviation for Certificate Revocation List
In short and in plain language
A CRL is a list of certificates that are no longer valid.
They were declared invalid before they ran out.
Browsers and systems can check the list. This way they can spot certificates that were withdrawn.
For firms, it is one part of keeping an eye on certificates.
Definition
A CRL is a list of certificates that were declared invalid before they expired. Browsers and systems can query it to recognise revoked certificates. For businesses it is one part of certificate monitoring.