7381ae66_ystems___MIT_Technology_Review__Description
SecuredE-mail www.cryptzone.com Yes (operates via Web) [Protection from distribution] None [Description] 
The system consists of a plug-in for an e-mail client or a specialized viewer. When a message is sent, it is encrypted and transmitted as an attachment to an ordinary message with instructions on how to read it. If a recipient has the plug-in, a secured message is transparently decrypted.
Overview of Electronic Mail Protection Systems | MIT Technology Review
Description