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- 27. What is PGP?
-
- This FAQ answer is excerpted from:
- PGP(tm) User's Guide Volume I: Essential Topics by Philip Zimmermann
- PGP(tm) uses public-key encryption to protect E-mail and data files.
- Communicate securely with people you've never met, with no secure channels
- needed for prior exchange of keys. PGP is well featured and fast, with
- sophisticated key management, digital signatures, data compression, and
- good ergonomic design.
- Pretty Good(tm) Privacy (PGP), from Phil's Pretty Good Software, is a high
- security cryptographic software application for MS-DOS, Unix, VAX/VMS, and
- other computers. PGP allows people to exchange files or messages with
- privacy, authentication, and convenience. Privacy means that only those
- intended to receive a message can read it. Authentication means that
- messages that appear to be from a particular person can only have
- originated from that person. Convenience means that privacy and
- authentication are provided without the hassles of managing 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 a powerful new technology called "public key"
- cryptography.
- PGP combines the convenience of the Rivest-Shamir-Adleman (RSA) public key
- cryptosystem with the speed of conventional cryptography, message digests
- for digital signatures, data compression before encryption, good ergonomic
- design, and sophisticated key management. And PGP performs the public-key
- functions faster than most other software implementations. PGP is public
- key cryptography for the masses.
-