gEfiAuthenticatedVariableGuid

Guid acted as the authenticated variable store header's signature, and to specify the variable list entries put in the EFI system table.
Include/Guid/AuthenticatedVariableFormat.h

GUID Information

GUID's Guid Name	GUID's Guid
gEfiAuthenticatedVariableGuid	{ 0xaaf32c78, 0x947b, 0x439a, { 0xa1, 0x80, 0x2e, 0x14, 0x4e, 0xc3, 0x77, 0x92 } }

Refer to Header File

MdeModulePkg/Include/Guid/VariableFormat.h