Here’s a very cool extension for Gmail in your Firefox browser. This will allow you to encrypt your email, gmail that is.
Originally I planned on using the Solitaire encryption algorithm devised by Bruce Schneier for the book, Cryptonomicon, written by Neal Stephenson. (As an aside, I heartily recommend this book.) However, this method has a couple of drawbacks when used to exchange regular emails rather than keeping spies safe in hostile territory.
* You need to exchange the keys and deck in some secure manner prior to sending the emails.
* It will require a separate deck and key to be kept safe for each person you correspond with in an encrypted fashion.
* Going back and decrypting old emails will require you to keep versions of the deck saved with each email. This is not only tiresome, but can probably be used by an attacker to break your encryption.
[tags]Gmail, Gmail Encrypt, Email Encryption, Google[/tags]