Article ID: 158739 - Last Review: July 7, 2008 - Revision: 4.1

How to Obtain 128-bit Encryption for Windows NT Service Packs and Networking Clients

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We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 7.0 running on Microsoft Windows Server 2008. IIS 7.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx (http://www.microsoft.com/technet/security/prodtech/IIS.mspx)

For more information about IIS 7.0, visit the following Microsoft Web site:

http://www.iis.net/default.aspx?tabid=1 (http://www.iis.net/default.aspx?tabid=1)

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SUMMARY

This article describes how to obtain 128-bit encryption for Windows NT service packs and networking clients.

MORE INFORMATION

You can download 128-bit versions of service packs or networking updates from the following Microsoft Web site:

http://www.microsoft.com/downloads/details.aspx?familyid=63D86C56-1BFC-40E3-86D4-8C9B27932A9A&displaylang=en (http://www.microsoft.com/downloads/details.aspx?familyid=63D86C56-1BFC-40E3-86D4-8C9B27932A9A&displaylang=en)

The licensing agreement for 128-bit downloads is displayed on this page. After you read the agreement, click I Agree to accept and acknowledge that you have read and understand the agreement.

After you accept the licensing agreement, the 128-bit download page is displayed and you can download a service pack or an update package. To download the 128-bit version of the latest service pack, click the appropriate link at the top of the page. To download 128-bit hotfixes and updates, click any of the following items displayed in the drop-down list box:

Windows NT 4.0 Post-SP3 Hotfix: Updated SChannel.dll -x86
Windows NT 4.0 Post-SP3 Hotfix: Updated SChannel.dll -Alpha
PPTP Performance and Security Upgrade for Windows NT 4.0 -x86
PPTP Performance and Security Upgrade for Windows NT 4.0 -Alpha
PPTP Performance and Security Upgrade Symbols for Windows NT 4.0 -x86
PPTP Performance and Security Upgrade Symbols for Windows NT 4.0 -Alpha
128-bit version of the Windows 98 Dial-Up Networking Security Upgrade
Windows 95 Dial-Up Networking 1.3 Utility to enable 128-bit encryptionNOTE: The last two items in the list are not rolled into Windows NT 4.0 Service Pack 4 (SP4) because they are updates to Microsoft Windows 95 and Microsoft Windows 98. For all other items, it is recommended that you install SP4 or later to correct these problems.

It is also important to note that the latest service packs include additional fixes and service-related updates, including Microsoft Internet Information Services (IIS) 4.0 components and Microsoft Internet Explorer components. Please refer to the Readme.txt file of the latest service pack to obtain a more complete list of fixes that are available.