Internet Explorer Does Not Allow Use of Single SGC Certificate with 128-Bit Encryption for Virtual Sites

View products that this article applies to.

This article was previously published under Q249197

SYMPTOMS

When you are attempting to connect to a Web server with multiple virtual sites with Server Gated Cryptography (SGC) encryption, 40-bit encryption is used instead of 128-bit encryption on virtual sites.

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RESOLUTION

Windows NT 4.0

A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS (http://support.microsoft.com/default.aspx?scid=fh;en-us;cntactms)

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later:

   Date      Time              Size       File name     Platform
   -------------------------------------------------------------
   12/14/1999  05:31p          123,664    Sch128c.dll   x86
   12/14/1999  05:31p          154,384    Schnlc.dll    x86
   12/14/1999  05:31p          226,576    Sch128c.dll   Alpha
   12/14/1999  05:31p          267,536    Schnlc.dll    Alpha

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Windows NT Server version 4.0, Terminal Server Edition

To resolve this problem, obtain the Windows NT Server 4.0, Terminal Server Edition, Security Rollup Package (SRP). For additional information about the SRP, click the article number below to view the article in the Microsoft Knowledge Base:

317636 (http://support.microsoft.com/kb/317636/EN-US/ ) Windows NT Server 4.0, Terminal Server Edition, Security Rollup Package

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STATUS

Microsoft has confirmed that this problem may result in some degree of security vulnerability in Microsoft Internet Explorer 5.

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MORE INFORMATION

Note that this hotfix also requires that the hotfix described in the following article in the Microsoft Knowledge Base be applied to your Windows NT-based computer:

248652 (http://support.microsoft.com/kb/248652/EN-US/ ) Dial-Up Networking Cannot Connect to 56-Bit Windows 2000 Server

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