PGP: Pretty Good Privacy

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Contents:

• books on PGP
• Purposes of encryption/security
• PGP
• GnuPG
• Comparison of PGP and S/MIME
• Key Servers and Server Products

Purposes of encryption/security:

• Encryption: encrypts the message so that only the recipients can decrypt the message. Thus if a message is intercepted, it can't be read.
• Signing: you can "digitally sign" your message, which means that your encryption/security program puts code in the message such that the person at the other end can verify that you were the person who actually composed and sent the message.
• With PGP or S/MIME packages, you can choose to encrypt, sign, or do both (or neither).

Comparison of PGP and S/MIME:

• Internet Mail Consortium's take on S/MIME and PGP/MIME
  
• S/MIME vs. PGP (requires Acrobat Reader) (disclaimer: this is put out by Worldtalk, makers of an S/MIME product)

PGP (Pretty Good Privacy) -- available for Mac OS, Windows, Unix, and other operating systems

• InvisiMail uses RPK encryption (also has editions which support PGP, S/MIME, and RPK) and also has anti-virus and anti-spam features. (Windows)
• PGP.com:
  • Freeware (Macintosh) (Windows)
  • MIT's freeware site (US and Canada)
  • PGP International from Network Associates International BV
  • Intl Freeware download from NAI
  • News from Phil Zimmerman (creator of PGP)
• Mollusc for Windows makes it easier to use PGP in e-mail programs for which a plugin doesn't already exist.
• Anthony Greene's Introduction to PGP
• PGP and Eudora: notes by Julian Koh (Mac-based, but should be informative for Win users too)
• Tom McCune's PGP page
• PGP Interactions Page "to find out about the various PGP plugins available for many different e-mail clients!"
• Yahoo's PGP category
• International PGP freeware site
• using PGP on Windows or Linux by Michael Pedersen and Greg Wooledge
• PGP for Pegasus
• QDPGP for Pegasus
• PGP for BeOS
• PGPB2 for Becky
• PGP for Palm
• PGP newsgroups:
  • alt.security.pgp
  • comp.security.pgp.announce
  • comp.security.pgp.discuss
  • comp.security.pgp.resources
  • comp.security.pgp.tech

GnuPG

• GnuPG "is a complete and free replacement for PGP. Because it does not use the patented IDEA algorithm, it can be used without any restrictions. GnuPG is a RFC2440 (OpenPGP) compliant application."
• GPGMail for Apple's OS X Mail client.
• MacGPG
  • EudoraGPG scripts for Mac OS X
• using GnuPG on Windows or Linux by Michael Pedersen and Greg Wooledge
• Windows Privacy Tray "is a taskbar utility for doing data en- or decryption."
• Eudora Email GnuPG plugin for Windows

Key Servers

• Keyserver.net
• certserver.pgp.com
• pgp.mit.edu

Key Server products:

• OpenKey Server for PGP keys, by Highware (MacOSX, Unix, Linux)
• PGP Key Server by PGP (Unix-Solaris/Windows)

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