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A server process uses the ImpersonateNamedPipeClient function to assume the security token of the client process connected to the specified pipe instance. This function can be useful in determining whether to grant the request of a client process. For example, a named pipe server can provide access to a database or file system to which the server process has privileged access. When a client process makes a request from the server, the client typically has some lesser level of security access. By assuming the security token of the client, the server can attempt to access the protected database. The system then grants or denies the server's access, based on the security level of the client. When the server is finished, it uses the RevertToSelf function to restore its original security token.

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Dmitry Vasiliev (just.dmitry)

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