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S/MIME 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:

  • Managing Exchange Server Permissions
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    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:

  • OL2000 - Encryption and Message Security Overview
  • OL2002 Encryption and Message Security Overview
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    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
     

    More Information

    Tools
    Mirracrypt Encryption for Outlook   Mirracrypt integrates seamlessly with Outlook 2003 & 2007 to provide powerful Sender-to-Receiver Email Encryption that is convenient and easy-to-use. Mirracrypt is the perfect add-on program for any Outlook user who requires privacy & security.
    Outlook 2000 128-bit encryption   For Service Release 1 only. Not needed for Windows 2000.
    SAFEmail.mil Security Subsystem   Component of military messaging client based on Outlook supports S/MIME v.3 encryption and signatures.
    SecurExchange   SecurExchange S/MIME is an Exchange Server component that will automatically digitally sign and/or encrypt mail that meet predefined event or message or attachment content policy conditions. SecurExchange SMIME uses the S/Mime and X.509 Certificate standard and is completely transparent to internal users, thus ensuring compliance to corporate or regulated policies and thereby protecting sensitive information outside of your organization.
    Updated 40- or 56-Bit Encryption Provider for Outlook 2000   For Service Release 1 only. Not needed for Windows 2000.
    Back to Top

     

    More Information
  • Compression Tools -- Some of these tools can encrypt as well as compress attachments.
  • Crypto Law Survey -- Encryption of e-mail is not universally legal. This site tracks encryption law around the world.
  • Digital IDs with Microsoft Outlook 98
  • X.400 Services

  • OL2002- Exchange 2000 Account with Revoked Security Can Send and Receive E-mail

  • Outlook S/MIME Vulnerability

  • OL2002 Recipients Cannot Read Messages When 168-Bit (3DES) Encryption Is Enabled -- discusses UseAlternateDefaultEncryptionAlg registry value

  • You Cannot Send Encrypted E-Mail Messages to a Contact While You Are Working Offline -- hotfix available for Outlook 2002

  • Windows Prompts You for Your Password Multiple Times When You Use Outlook If Strong Private Key Protection Is Set to High -- hotfix available for Outlook 2002

  • Quick Start for SMIME in Exchange Server 2003

  • OL2002 Recipients Cannot Read Messages When 168-Bit (3DES) Encryption Is Enabled

  • Signed E-Mail Message Displays the Incorrect Sending Address

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    Updated Jul 15 2008
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