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TokenImpersonationLevel Enumeration

Defines security impersonation levels. Security impersonation levels govern the degree to which a server process can act on behalf of a client process.

Namespace:  System.Security.Principal
Assemblies:   mscorlib (in mscorlib.dll)
  System.Security.Principal (in System.Security.Principal.dll)

[SerializableAttribute]
[ComVisibleAttribute(true)]
public enum class TokenImpersonationLevel

Member nameDescription
AnonymousThe server process cannot obtain identification information about the client, and it cannot impersonate the client.
DelegationThe server process can impersonate the client's security context on remote systems.
IdentificationThe server process can obtain information about the client, such as security identifiers and privileges, but it cannot impersonate the client. This is useful for servers that export their own objects, for example, database products that export tables and views. Using the retrieved client-security information, the server can make access-validation decisions without being able to use other services that are using the client's security context.
ImpersonationThe server process can impersonate the client's security context on its local system. The server cannot impersonate the client on remote systems.
NoneAn impersonation level is not assigned.

Impersonation is the ability of a process to take on the security attributes of another process.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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