I wrote this as a simple front-end to the Crypt_Blowfish class of the PEAR project. Blowfish encryption uses a given pass-phrase to encrypt a message. The output looks like garbage text to anyone who doesn't know the pass-phrase. I have further wrapped the output of the blowfish in a base64 encode, so that it can be nicely transmitted via e-mails and IMs without nasty characters getting in the way.

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