PGP Digital Signatures

PGP encrypted files may contain digital signatures. Digital signatures enable the recipient of a file to verify the authenticity of the information's origin, and also verify that the information has not been tampered with. A digital signature also prevents the sender from claiming that he or she did not actually send the information. Therefore, A digital signature serves the same purpose as a handwritten signature in that it attests to the contents of the information as well as to the identity of the signer.