Glossary
Certificate Revocation
Certificate revocation is an act by a certificate authority declaring a digital certificate invalid before the end of its normal validity period.
Full Definition
Revocation occurs when a private key is compromised, the owner's identity changes, or at the certificate holder's own request. The CA publishes the revocation in a Certificate Revocation List (CRL) and via OCSP. Signatures created before the revocation remain valid if their timestamp predates the revocation — which is why a qualified timestamp is critical for long-term archiving.
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