Site home page
Get alerts when Linktionary is updated
Book updates and addendums
Get info about the Encyclopedia of Networking and Telecommunicatons, 3rd edition (2001)
Download the electronic version of the Encyclopedia of Networking, 2nd edition (1996). It's free!
Contribute to this site
Electronic licensing info
PGP (Pretty Good Privacy)
Related Entries Web Links New/Updated Information
Note: Many topics at this site are reduced versions of the text in "The Encyclopedia of Networking and Telecommunications." Search results will not be as extensive as a search of the book's CD-ROM.
PGP is an encryption and digital signature utility for adding privacy to electronic mail and stored data. Phil Zimmermann designed PGP in the early 1990s on the principle that e-mail, like conversations, should be private. In addition, both sender and receiver need assurances that messages are from an authentic source, that messages have not been altered or corrupted, and that the sender cannot repudiate (disown) the message. PGP can assure privacy and nonrepudiation. It also provides a tool to encrypt information on disk.
PGP was expanded over the years by an all-volunteer collaborative effort guided by Zimmermann. It is discussed in RFC 1991 (PGP Message Exchange Formats, August 1996). RFC 2015 (MIME Security with Pretty Good Privacy, October 1996) also discusses PGP. Open PGP is also discussed in RFC 2440 (Open PGP Message Format, November 1998).
PGP is an alternative to RSA's S/MIME (Secure MIME). S/MIME uses RSA (Rivest, Shamir, Adleman) public-key algorithms, while PGP uses Diffie-Hellman public-key management algorithms.
This topic continues in "The Encyclopedia of Networking and Telecommunications."
See "Public-Key Cryptography" and "Digital Signatures" for related information.
Copyright (c) 2001 Tom Sheldon and Big Sur Multimedia.