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The process of changing the status of a valid certificate to suspended (i.e., temporarily invalid).
CNSSI 4009-2015 from CNSSI 1300
The process of temporarily changing the status of a key or certificate to invalid (e.g., in order to determine if it has been compromised). The certificate may subsequently be revoked or reactivated.
NIST SP 800-57 Part 2 Rev.1 under Suspension