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A Public Key Infrastructure must retain a key history
True
False
The correct answer is 'True'. To keep track of all old and current public key that have been used by individuals.
If A encrypts a symmetric key with B's old public key there needs to be a way for B to access the older key. This is only possible if the Certificate Authority (CA) keeps a proper history of B's old certificates and keys.
[CITATION NEEDED]: I'd argue that expired / revoked keys can be forgotten about, as it being missing means it is not authorized.
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