Microsoft KB Archive/239850

= SChannel.dll Updated to Support Multiple SGC Certificate Authorities =

Article ID: 239850

Article Last Modified on 9/11/2007

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APPLIES TO


 * Microsoft Windows NT Server 4.0, Terminal Server Edition
 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT Server 4.0 Enterprise Edition
 * Microsoft Internet Information Server 4.0

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This article was previously published under Q239850



SYMPTOMS
When you apply for a Server Gated Cryptography (SGC) digital certificate for a computer running Microsoft Internet Information Server, you cannot obtain and install a digital certificate from a non-VeriSign SGC Certificate Authority.



CAUSE
This behavior occurs because secure channel support in the Schannel.dll file in Windows NT 4.0 does not interoperate with a non-VeriSign SGC Certificate Authority.



Windows NT Server or Workstation 4.0
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:


 * http://www.microsoft.com/downloads/details.aspx?FamilyID=e396d059-e402-46ef-b095-a74399e25737&DisplayLang=en -or-


 * 152734how to obtain the latest windows nt 4.0 service pack

For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://support.microsoft.com/directory/overview.asp

Windows NT Server 4.0, Terminal Server Edition
To resolve this problem, obtain the latest service pack for Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack



STATUS
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition.

This problem was first corrected in Windows NT Server 4.0 Service Pack 6 and Windows NT Server 4.0, Terminal Server Edition Service Pack 6.



MORE INFORMATION
SGC (Server Gated Cryptography) is a security technology that has 128-bit cryptography for online banking and other approved uses. With the application of Windows NT 4.0 Service Pack 6, the Schannel.dll file does support SGC digital certificates from multiple SGC certificate authorities.

For more information about security technologies, please refer to the Technologies section at the following Microsoft Web site:

http://www.microsoft.com/athome/security/default.mspx

Additional query words: e-commerce

Keywords: kbbug kbfix kbinterop KB239850

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