Learn in the textbookThe Certificate Authority and the Operation and Revocation of Certificates
DefinitionThe Japanese term 証明書失効リスト (certificate revocation list) is the Japanese name for a CRL: the list of certificates invalidated partway through their validity period.
ExplanationThe CA compiles this list, signs it, and updates and publishes it at regular intervals. A recipient holding an old copy would miss recent revocations, so they fetch the latest version before checking.
AnalogyIt is like posting the numbers of reported-lost staff badges at the front desk. The desk compares each visitor's badge against the list before letting them in.
Memory hookThe Japanese 失効 is written "lose effect", which uses different characters from 満了, "run to term"; the characters themselves tell revocation and expiry apart.