MessageLock provides 1-click encryption of email messages and attachments within Microsoft Outlook, combining strong U.S. Gov't approved AES-256 bit encryption with the nearly universal compatibility of the Zip file utlity. It delivers encryption and compression for your message and/or file attachments, providing protecting your data while in transit across your intranet and the Internet. It gives you a choice of encryption methods, from super-strong AES-256 bit, to AES-128 bit, and the weak but highly compatible Zip-2.0 algorithm.