Eudora Enscrypt for Mac

From Hunt Taylor:

EnScrypt is a suite of applications (written in Applescript) providing high quality and easy-to-use encryption and digital signatures for many of the applications Mac enthusiasts use for text processing and communication. Different modules in the suite work with various applications including Eudora, Entourage, Mail (Apple), Tex-Edit Plus, Microsoft Word. More are on the way. Each module is designed to be fully compatible with every other module, meaning that users can create encrypted text with one application, send the message to a correspondent, who can then decrypt it with a different application.

The typical use for EnScrypt would be secure communications. Because it uses a state-of-the-art encryption algorithm (Blowfish) with a 128 bit key, you would probably call it "strong encryption", although the use of shorter or overly simple passwords would surely compromise the security. EnScrypt also includes "SHA1" for digital signatures.

The user selects a plain text message in one of the supported programs. Then he runs EnScrypt. The encrypted version of the text either replaces the original or is placed in a new document. It is encoded it so that it can be transported easily, and it is signed so that a recipient with the right password can confirm the integrity of both the text and the sender's identity.

This version for encrypting and decrypting text from Eudora.