olemus
ISO/IEC 11770-1:
teenus, mis tagab võtme turvalise desaktiveerimise
=
service which assures the secure deactivation of a key

ülevaateid
https://cybersecurityglossary.com/key-revocation/

https://security.stackexchange.com/questions/109453/what-does-revoking-a-key-actually-do

vt ka
https://en.wikipedia.org/wiki/Certificate_revocation_list