KB971737

This article describes a nonsecurity update which implements Extended Protection for Authentication in Microsoft Windows HTTP Services (WinHTTP).

When Extended Protection for Authentication is enabled, authentication requests are bound to both the Service Principal Names (SPN) of the server to which the client tries to connect and to the outer Transport Layer Security (TLS) channel over which the Integrated Windows authentication occurs.

To use the features that this update includes, update 968389 must be installed on the computer. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
968389 Extended Protection for Authentication

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