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The SECURITY_IMPERSONATION_LEVEL enumeration defines a set of values that specifies security impersonation levels. These levels govern the degree to which a server process can act on behalf of a client process.
This enumeration has no effect on message processing in any environment.
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typedef enum _SECURITY_IMPERSONATION_LEVEL { SecurityAnonymous = 0, SecurityIdentification = 1, SecurityImpersonation = 2, SecurityDelegation = 3 } SECURITY_IMPERSONATION_LEVEL, *PSECURITY_IMPERSONATION_LEVEL;
SecurityAnonymous: The server cannot obtain information about the client and cannot impersonate the client.
SecurityIdentification: The server can obtain information such as security identifiers and privileges, but the server cannot impersonate the client.
SecurityImpersonation: The server can impersonate the client's security context on its local system, but cannot impersonate the client when communicating with services on remote systems.
SecurityDelegation: The server can impersonate the client's security context when communicating with services on remote systems.