[Univ of Cambridge] [Dept of Engineering]

PGP: signed documents

Documents are signed by prefixing them with signature certificates, which contain the key ID of the key that was used to sign it, a secret-key-signed message digest of the document, and a timestamp of when the signature was made. The key ID is used by the receiver to look up the sender's public key to check the signature. The receiver's software automatically looks up the sender's public key and user ID in the receiver's public key ring.
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Updated December, 1999
tpl@eng.cam.ac.uk and mgj17@eng.cam.ac.uk