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...mdash; [[block cipher]]s, [[stream cipher]]s, [[public key]] encryption, [[digital signature]]s, and [[hashed message authentication code]]s — depend on [[cryptog

All versions use a [[public key]] cryptosystem to provide [[digital signature]]s and to manage keys for a [[block cipher]] which does the actual message ...public domain. Later versions of PGP also support the [[NSA]]-developed [[Digital Signature Algorithm]]; at one point, there was an advantage to this in that it was un

...ate message to affect a poll). In general, these techniques are based on [[digital signature]]s. ...[authentication]] as possible. Invisible from the user is that it create a digital signature of the message.

...ymmetric techniques by orders of magnitude, it is more efficient to only [[Digital signature|sign]] the hash of a message than the message itself. Similarly, public-key

...d confidentiality concerns to include techniques for [[authentication]], [[digital signature]]s, [[interactive proof]]s, and [[secure multiparty computation|secure comp

Hashes are also an essential component of [[digital signature]] algorithms. A signature is essentially a hash encrypted with the signer's

The legal status of [[digital signature]]s can be an issue, and cryptographic techniques may affect the acceptabili

...ld and let a message seem to be from any mail address. It is possible to [[Digital signature|digitally sign]] e-mail, which is much harder to fake. Some [[Internet serv

...ding section; the other is that public key techniques are the basis for [[#digital signature|digital signatures]]. ...document. The details are somewhat more complex and are dealt with in a [[#digital signature|later section]].

3) publish authentication records as needed to provide digital signature protection for the entire content of email messages.<br />

...t electronically signed by a particular person, then you need his or her [[digital signature]] and a [[public key]] cryptosystem to verify it with. and if you need mail