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Internet email is about as secure as sending a postcard--any postal clerks along the delivery path can read your message if they wanted to since there's no envelope to protect it. So if you're concerned about your private email or files falling into the wrong hands, encryption is the solution.
Are You a Crypto Criminal?
PGP is such a good program that the United States government has classified it as a "munition" and made exporting it illegal, for reasons of national security. Apparently the feds are worried that the bad guys will be able to correspond in a way they can't decode. Although it is not illegal to send a message that has been encoded by PGP, you can't export (via email, FTP, or any other means) the PGP sofware from the United States, except to Canada (or from Canada, except to the United States), without a license from the federal government. The one strange exception to this rule is that printed books containing the PGP source code can be exported.
It is also illegal to use PGP in some countries (it's legal in the United States), so if you are an evil terrorist or are plotting the overthrow of your government, check with your local authorities first before using PGP. The Crypto Law Survey at http://rechten.uvt.nl/koops/cryptolaw summarizes the legalities of PGP around the world.
Getting PGP
If you're interested in learning more about PGP, visit the International PGP Home Page at http://www.pgpi.org.
Previous Lesson: Encoding and Decoding
Next Lesson: Accesing DOS Files
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