# LegacyAuthenticationLevel

Sets the default authentication level for applications that do not call CoInitializeSecurity.

Registry Entry

HKEY_LOCAL_MACHINE\Software\Microsoft\OLE\
LegacyAuthenticationLevel= default_authentication_level

Remarks

LegacyAuthenticationLevel is a named-value is a REG_WORD that sets the default level of authentication for all applications which do not call CoInitializeSecurity. Values are from 1 through 6, and correspond to the RPC_C_AUTHN_LEVEL_xxx constants:

Value | Meaning
1 | RPC_C_AUTHN_LEVEL_NONE
2 | RPC_C_AUTHN_LEVEL_CONNECT
3 | RPC_C_AUTHN_LEVEL_CALL
4 | RPC_C_AUTHN_LEVEL_PKT
5 | RPC_C_AUTHN_LEVEL_PKT_INTEGRITY
6 | RPC_C_AUTHN_LEVEL_PKT_PRIVACY

When this named-value is not present, the default authentication level established by the system is 2 (RPC_C_AUTHN_CONNECT).

See Also

CoInitializeSecurity, RPC_C_AUTHN_LEVEL_xxx, Registering COM Servers