Encryption Plus for Email - Version 2.1 Encryption Plus for Email is the ONLY one- step email encryption plug-in for MS Outlook 97/98/2000 (not Outlook Express). This handy little program gives you the option to encrypt your outgoing messages with 'just one click!' And your recipient does not need any special software -- just the password. This Ad-enabled freeware version uses the well-documented blowfish algorithm with 56-encryption. The upgrade to the full version includes stronger 192-bit encryption and advanced features such as automatic encryption password management. Also available is an enterprise version with centralized administration features, including key recovery. For Windows 95/98/2000/NT. Supports Microsoft Outlook '97/'98 & 2000. Recipients of encrypted emails must be using the Microsoft Windows Operating system.