The Key Management Service (KMS) protocol as defined in the UEFI 2.3.1 specification is to provides services to generate, store, retrieve, and manage cryptographic keys. The intention is to specify a simple generic protocol that could be used for many implementations.

A driver implementing the protocol may need to provide basic key service that consists of a key store and cryptographic key generation capability. It may connect to an external key server over the network, or to a Hardware Security Module (HSM) attached to the system it runs on, or anything else that is capable of providing the key management service.

Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

GUID Information

GUID's Guid Name	GUID's Guid
gEfiKmsFormatRsasha12048Guid	{ 0xf66447d4, 0x75a6, 0x463e, {0xa8, 0x19, 0x07, 0x7f, 0x2d, 0xda, 0x05, 0xe9 }}

Refer to Header File

MdePkg/Include/Protocol/Kms.h