SID_IDENTIFIER_AUTHORITY structure (winnt.h)

The SID_IDENTIFIER_AUTHORITY structure represents the top-level authority of a security identifier (SID).

Syntax

typedef struct _SID_IDENTIFIER_AUTHORITY {
  BYTE Value[6];
} SID_IDENTIFIER_AUTHORITY, *PSID_IDENTIFIER_AUTHORITY;

Value[6]

An array of 6 bytes specifying a SID's top-level authority.

The identifier authority value identifies the agency that issued the SID. The following identifier authorities are predefined.

Identifier authority	Value
SECURITY_NULL_SID_AUTHORITY	0
SECURITY_WORLD_SID_AUTHORITY	1
SECURITY_LOCAL_SID_AUTHORITY	2
SECURITY_CREATOR_SID_AUTHORITY	3
SECURITY_NON_UNIQUE_AUTHORITY	4
SECURITY_NT_AUTHORITY	5
SECURITY_RESOURCE_MANAGER_AUTHORITY	9

A SID must contain a top-level authority and at least one relative identifier (RID) value.

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Header	winnt.h (include Windows.h)