I am a believer in encryption for the masses. One of the most popular encryption programs is PGP (Pretty Good Privacy) which was distributed by Phil Zimmerman. Encryption can be thought of as a digital envelope. When you send email it is essentially the same as sending a postcard. Like a postcard, your email can be read at any point along the way. When you encrypt your message it is like putting the postcard or letter in an envelope. People are not able to read the message unless they have the key to unlock the envelope. To learn more about encryption and to download the most recent version of PGP visit the MIT PGP distribution site. For those of you who know how to use PGP, here is my PGP public key.
Just to give you an idea of what encryption is, here is the above paragraph encrypted with my public key:
-----BEGIN PGP MESSAGE-----
Version: PGP for Personal Privacy 5.0
-----END PGP MESSAGE-----