A-Lock is a compact program that allows you to encrypt all or part of an email message from within an email program. A high level of protection is provided using the proven Blowfish algorithm. Only those with the correct password can read your messages. It also includes a lockable list file for names and passwords. It has automatic one-click encryption and decryption, and an automatic registration procedure. This version allows various authorization levels to read either parts of or the entire message. In the shareware version, the password book is disabled. Registration costs $15.