Invalidation of a key pair. Revoked certificate is listed in Certificate Revocation List. Signature created with a revoked certificate should be considered invalid. To reject such signatures you have to update CRLs installed in your system or check certificate status online.
Certificates have a specified lifetime, but CAs can reduce this lifetime by the process known as certificate revocation
The act of identifying certificates that are no longer trusted. Revoked certificates are identified on Certificate Revocation Lists (CRLs). With enhanced security management, applications automatically check the revocation status of certificates before trusting them.