Pretty Good Privacy

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Pretty Good Privacy

(tool, cryptography)
(PGP) A high security RSA public-key encryption application for MS-DOS, Unix, VAX/VMS, and other computers. It was written by Philip R. Zimmermann <> of Phil's Pretty Good(tm) Software and later augmented by a cast of thousands, especially including Hal Finney, Branko Lankester, and Peter Gutmann.

PGP was distributed as "guerrilla freeware". The authors don't mind if it is distributed widely, just don't ask Philip Zimmermann to send you a copy. PGP uses a public-key encryption algorithm claimed by US patent #4,405,829. The exclusive rights to this patent are held by a California company called Public Key Partners, and you may be infringing this patent if you use PGP in the USA. This is explained in the PGP User's Guide, Volume II.

PGP allows people to exchange files or messages with privacy and authentication. Privacy and authentication are provided without managing the keys associated with conventional cryptographic software. No secure channels are needed to exchange keys between users, which makes PGP much easier to use. This is because PGP is based on public-key cryptography.

PGP encrypts data using the International Data Encryption Algorithm with a random session key, and uses the RSA algorithm to encrypt the session key.

In December 1994 Philip Zimmermann faced prosecution for "exporting" PGP out of the United States but in January 1996 the US Goverment dropped the case. A US law prohibits the export of encryption software out of the country. Zimmermann did not do this, but the US government hoped to establish the proposition that posting an encryption program on a BBS or on the Internet constitutes exporting it - in effect, stretching export control into domestic censorship. If the government had won it would have had a chilling effect on the free flow of information on the global network, as well as on everyone's privacy from government snooping.


Justice Dept. announcement.

["Protect Your Privacy: A Guide for PGP Users", William Stallings, Prentice-Hall, ISBN 0-13-185596-4].
References in periodicals archive ?
The most common security protocols used in eCommerce secure framework are Pretty Good Privacy (PGP), Secure Socket Layer (SSL) and Secure Electronic Transaction (SET).
PGP, for Pretty Good Privacy, is a public key cryptography method generally used in email.
CNET has prepared a special feature entitled Privacy in the Digital Age, which, even though it is several years old, provides a basic introduction to the topic and includes RealAudio interviews with experts such as Philip Zimmerman, creator of Pretty Good Privacy (PGP), "a popular encryption program that the government can't crack," and David Sobel of EPIC.
PHIL ZIMMERMAN: IN 1991, he invented PGP - Pretty Good Privacy - a free encryption system for individuals.
The revolution is being led by PGP or Pretty Good Privacy (www.
Network Associates has grown rapidly through the acquisition of many leading technology companies, such as Network General (NetGen), Trusted Information Systems (TIS), Pretty Good Privacy (PGP), Magic HelpDesk Solutions (Magic), Dr.
Network Associates ha crecido rapidamente tras adquirir varias companias importantes de tecnologia, entre ellas Network General (NetGen), Trusted Information Systems (TIS), Pretty Good Privacy (PGP), Magic HelpDesk Solutions (Magic), Dr.
Effective blocking software known as Pretty Good Privacy (PGP) already exists that allows consumers to have secure places where they can make transactions and store their data.
One person who has opposed the US government is Phillip Zimmermann who wrote and released on the Internet an encryption program called Pretty Good Privacy (PGP).
An example of a message encrypted by one such program, Pretty Good Privacy (PGP), is depicted in Figure 1.
Just ask Phil Zimmerman, the author of Pretty Good Privacy.
A few years ago, Boulder software engineer and peace activist Philip Zimmermann wrote a computer program called Pretty Good Privacy, designed to let ordinary people keep their electronic mail private.