Description of the Credential Security Support Provider (CredSSP) in Windows XP Service Pack 3

      CredSSP is a new Security Support Provider (SSP) that is available in Windows XP SP3 by using the Security Support Provider Interface (SSPI). CredSSP enables a program to use client-side SSP to delegate user credentials from the client computer to the target server. (The target server is accessed by using server-side SSP). Windows XP SP3 involves only the client-side SSP implementation. The client-side SSP implementation is currently being used by Remote Desktop Protocol (RDP) 6.1 Terminal Services (TS). However, the client-side SSP implementation can be used by any third-party program that is willing to use the client-side SSP to interact with programs that are running server-side SSP implementations in Windows Vista or in Windows Server 2008.

To download the CredSSP protocol specification, visit the following Microsoft Web site:

http://download.microsoft.com/download/9/5/E/95EF66AF-9026-4BB0-A41D-A4F81802D92C/%5BMS-CSSP%5D.pdf

Note By default, CredSSP is turned off in Windows XP SP3.

Read more: MS Support
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