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AuthenticationLevel

Sets the authentication level for applications that do not call CoInitializeSecurity or for applications that call CoInitializeSecurity and specify an AppID.

Registry Entry

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID
   {AppID_GUID}
      AuthenticationLevel = value

Remarks

This is a REG_DWORD value that is equivalent to the RPC_C_AUTHN_LEVEL constants.

ValueConstant
1RPC_C_AUTHN_LEVEL_NONE
2RPC_C_AUTHN_LEVEL_CONNECT
3RPC_C_AUTHN_LEVEL_CALL
4RPC_C_AUTHN_LEVEL_PKT
5RPC_C_AUTHN_LEVEL_PKT_INTEGRITY
6RPC_C_AUTHN_LEVEL_PKT_PRIVACY

 

The AuthenticationLevel value is similar to the LegacyAuthenticationLevel value. If the AuthenticationLevel value is present, it is used instead of the LegacyAuthenticationLevel value for that AppID.

If the AuthenticationLevel value is of the wrong type or out of range, CoInitializeSecurity fails, causing interface marshaling to fail. This prevents the application from making any calls at all (cross-apartment, cross-thread, cross-process, or cross-computer).

The AuthenticationLevel and AccessPermission values are independent. If one is not present, the default is used. The following rules list the interaction between the AuthenticationLevel value and the AccessPermission value:

Related topics

Authentication Level Constants
LegacyAuthenticationLevel
Registering COM Servers
Security in COM

 

 

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