How to Use Pretty Good Privacy (PGP)

    Official PGP Documentation

     PGP 2.x

     PGP Documentation Part 1 Plain Text
     PGP Documentation Part 2 Plain Text
     PGP 2.x Windows 3.x/9x/NT HELP format

     PGP 5.x

     PDF format

     PGP 5.0 Manual (1.6 Mb)
     PGP 5.5 Documentation Windows 9x (1.3 Mb)
     PGP Macintosh Documentation (1 Mb)

     PGP 6.0

     PDF format

     PGP 6.0 Windows 9x Users Guide (1.7 Mb)
     Introduction to Cryptography (<1 Mb)
     PGP 6 Windows 9x Install Guide (<1 Mb)
     PGP 6 MacIntosh Users Guide (1.7 Mb)

     PGP 6.5

     PDF format

     PGP 6.5 Intro to Cryptography (1.1 Mb)
     PGP 6.5 command Line Instructions (500 kb)
     PGP 6.5 Windows 9x Users Guide (3.1 Mb)

    Other PGP Documentation

    Although the documentation that comes with PGP 5.0 and above is very complete, you might also want to read this document as well as some of those linked below. These documents cover all the basic steps needed to install and use PGP, and also give tips on how to use it more effectively.

    PGP version 5.x and 6.x

    PGP Installation and Use for Dummies
    A step-by-step installation guide for the novice. Based on the 5.5.3i version but very usable for versions 5.x and 6.x

    PGP version 2.x

    Beginner's guide to PGP
    Written for versions 2.6.2 or 2.6.3i.

    Good Resources

    The comp.security.pgp FAQ
    Answers most, if not all, questions about PGP.

    PGP DH vs. RSA FAQ

    Questions?

    The PGP Help Team will answer all your questions about PGP from start to end.

    Tom McCune's PGP Questions & Answers


    PGP Security

    An important aspect of PGP security is to make up good, hard-to-guess passwords. With the level of security that encryption can offer, the easiest way to 'crack' an encrypted file is usually by guessing the password. This will help you to pick a passph rase in such a way that it will be very hard if not impossible to guess. If you are using a front-end, shell or utility with pgp please read the warning in that section.

    Good Passphrase Hygiene Essential Reading

    Why you should sign your own key
    A very detailed analysis explaining why it is recommended that you sign all user IDs on your own key with your own secret key.


    Use Strong Crypto

    Once you get PGP 5+ or 6+ installed on your machine - one of the first things you should do is go into your settings/preferences area and disable the DES and 3DES encryption algorithms (which are weak and easily broken). The preferred algorithms, which are much stronger, are IDEA, Blowfish, and CAST. These are the only ones that should be used to ensure that your messages and files are secure.

    PGP Public Key Servers

    The whole concept of public keys is that you can announce your public key in public, so that someone who wants to correspond with you securely can simply obtain your public key from somewhere and use it. Keyservers are the most popular locations for ob taining public keys. If your browser supports forms, you can use a Web based interface to obtain keys. PGP versions 5+ have built-in keyserver support.

    The WWW Based PGP 5.0 Key Server System


    Disk Encryption

    While a program such as PGP is good for encrypting e-mail or individual files, it is less useful to protect the contents of your entire hard disk. Even if you never forget to re-encrypt and securely wipe every file after use, editors and other programs may leave temporary files behind. If you encrypt the whole hard disk at once (similar to how Stacker or DriveSpace compress it), you don't have to worry about that anymore. Disk encryption software.






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