PGP Encryption and Message Security Tools

This page deals with tools and methods that add encryption, digital signatures, or rights management to individual messages. For tools dealing with securing Outlook and Exchange data with folder and user permissions, see:

To add encryption and security signatures to Exchange messages on the Internet, you can use either PGP (Pretty Good Privacy) or S/MIME (Secure MIME.) S/MIME support is built into Outlook, starting with Outlook 98. See:

Choose Tools | Options | Security. You can add S/MIME support to earlier versions with third-party utilities. CW users note: OL2000 (CW): Rich Text Signed Messages Are Always Sent As HTML. With Outlook 97, you can tell that you've received an S/MIME message if it has an attachment with one of these extensions: 

.p7s	Signed, but not encrypted
.p7c	Certificate only, no digital signature or encryption
.p7m	Signed and encrypted. Cannot be read except by an S/MIME client

Outlook 2000 SR-1/1a adds support for S/MIME version 3, but most features need to be activated via Windows registry settings. A white paper, Microsoft Outlook 2000 Service Release 1, provides complete details.

For S/Mime utilities, see S/MIME Encryption and Message Security Tools
PGP add-ins are now found at PGP Encryption and Message Security Tools
Public key servers and other services are listed at Secure E-mail Services
Tools and utilities which do not fit any of the above categories are list at Encryption and Message Security Tools

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