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Jun
14
comment Is it possible to cryptographically prove when was the last time a ciphertext was decrypted/encrypted?
Right, great answer, thanks for that. I'll just publish the source and hope that's enough for the users.
Jun
14
comment Is it possible to cryptographically prove when was the last time a ciphertext was decrypted/encrypted?
The scenario is this - I want to provide a service that encrypts and decrypts documents and I want to provide the users with proof that I haven't stolen their secret key and read their documents.