公开(公告)号：US20220207155A1

公开(公告)日：2022-06-30

申请号：US17134348

申请日：2020-12-26

Applicant: Intel Corporation

Inventor： Siddhartha CHHABRA ,  Thripthi HEGDE ,  Reouven ELBAZ

IPC: G06F21/60

Abstract: Detailed herein is instruction level support to allow untrusted software to save/restore key state from the memory encryption engine to support S3/S4 flows on clients. In a first embodiment, the save/restore is done by the untrusted software and encryption hardware alone. In another embodiment, a security engine (which forms the root of trust on the platform) is involved to protect the keys before handing over to untrusted software. Either embodiment uses the instructions introduced herein which may work differently underneath depending on the implementation option chosen.