Look at GPG for Novices. You need to install GnuPG, WinPT, and GPGee (a plugin for MS IE). There is an integrated installer at http://www.gpg4win.org/
Screen shots showing how to use "GPGee" Windows interface to
GnuPG (included in the above install).
File the notepad file in a directory window ("Explorer") and
Right-Click it. From the drop-down menu select
"GPGee". Select "Sign & Encrypt" to be done in one
operation.
You next get to choose the recipients from the list of Public
Keys in your Public Key Ring. It will automatically add your
Public Key as well, the one that matches the Private "Signing Key"
shown below, so you can decrypt the message later.
You can check your message by decrypting it. Choose
"Decrypt & Verify" (the only option for files whose extension
is "asc", "gpg", or "pgp". You will see a list of recipients
and key identifiers. Your Public Key is also present but not
shown (except in the "Signing Key" box.
With a successful decryption, you should see the results and the
new plaintext file's name in another pop up.
Other programs that are available (WinPT and the GPG Shell program
are in the above installer). Use WinPT to generate your
personal Public/Private Key pair.
GPG Shell
-- First install GPG and then install the GPG Shell. This
software is produced by a guy named Roger Sondermann.
Open the Utility "Command Prompt".
Nullify -- Easiest. It's a Windows installer and it includes GnuPG and the shell, so the install is one step.
WinPT -- This package is a tad more difficult to use, but it works on the clipboard so it is compatible with ALL mail or text programs.
Wikipedia article on GnuPG
- http://en.wikipedia.org/wiki/GNU_Privacy_Guard
Another interface program, "GNU Privacy Assistant" has a check box only called "Armor" which leads to a ".asc" file rather than a binary ".gpg" file.
