公开(公告)号：US20180091315A1

公开(公告)日：2018-03-29

申请号：US15277501

申请日：2016-09-27

Applicant: QUALCOMM Incorporated

Inventor： Ashish SINGHAL ,  David HUGHES ,  Darren LASKO ,  Jeffrey BRASEN ,  Raghavendar BHAVANSIKAR

IPC: H04L9/32 ,  G06F9/44 ,  G06F21/57 ,  G06F12/02

CPC classification number: H04L9/3268 ,  G06F8/654 ,  G06F9/4401 ,  G06F11/1417 ,  G06F12/0238 ,  G06F12/0661 ,  G06F12/0676 ,  G06F21/57 ,  G06F21/575 ,  G06F2212/1052 ,  G06F2212/7209 ,  G06F2221/2111 ,  G06F2221/2133

Abstract: Disclosed are implementation for revoking and updating a compromised root-of-trust (ROT), including a method comprising determining whether a current validation value, representative of an expected value resulting from application of a validation function to a current certificate, is to be replaced, with the current validation value being stored in a write-restricted non-volatile memory unit of the device. The method also comprises determining at boot time whether a physical presence indicator, configured to be non-actuatable from non-proximate locations, is set to a value indicating that an actuation mechanism (for actuating the physical presence indicator so as to cause content change for the write-restricted memory), has established physical presence with the device, and providing a new validation value in response to determining that the current validation value is to be replaced and that the physical presence indicator indicates that physical presence has been established.