Pretty Good Privacy

Pretty Good Privacy (PGP) is a computer program that provides cryptographic privacy and authentication. PGP is often used for signing, encrypting and decrypting electronic mails (e-mails) to increase the security of e-mail communications. It was originally created by Phil Zimmermann in 1991.

PGP and other similar products follow the OpenPGP standard (RFC 4880) for encrypting and decrypting data.

Further reading

Garfinkel, Simson (1991-12-01). PGP: Pretty Good Privacy. O'Reilly & Associates. ISBN 1-56592-098-8.
Zimmerman, Phil (June 1991). "Why I Wrote PGP" (1999 ed.). Retrieved 2008-03-03.

Other websites

OpenPGP implementations

PGP Corporation Archived 2004-12-30 at the Wayback Machine
GNU Privacy Guard
cGeep Pro Archived 2008-10-29 at the Wayback Machine
OpenPGP::SDK Archived 2012-12-25 at Archive.today
Authora Inc. Archived 2012-09-24 at the Wayback Machine
McAfee Inc.
Feneris Solutions Inc. Canada
EasyByte Cryptocx - Component
Veridis Archived 2004-12-17 at the Wayback Machine
Legion of The Bouncy Castle Archived 2012-05-12 at the Wayback Machine
BSD Privacy Guard Archived 2006-06-13 at the Wayback Machine
Prime Factors Inc. Archived 2009-02-20 at the Wayback Machine
Oxford Brookes Secure Email Proxy Archived 2009-02-21 at the Wayback Machine

Support

PGP Corporation Support Forum Archived 2008-10-19 at the Wayback Machine community support plus contributions from PGP Support staff
Phil Zimmermann's Home Page
MIT Public Key Directory for Registration and Search
List of public keyservers
IETF OpenPGP working group
OpenPGP Alliance