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PGP Digital Signatures

PGP uses the modern terminology for digital signatures, where the document itself is not encrypted, but an encrypted message digest is appended for transmission:
PGP digital signature operation
It's obvious that it is possible to both sign and encrypt a document in PGP if required. Exercise: how?
 
Lecture 18: Encryption #3 -- Practical Encryption Copyright © 2003 P.Scott, La Trobe University Bendigo.



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