The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 10, 2018
Filed:
Jan. 23, 2017
Synopsys, Inc., Mountain View, CA;
Michael Kenneth Bowler, Ottawa, CA;
Andrew Alexander Elias, Ottawa, CA;
Synopsys, Inc., Mountain View, CA (US);
Abstract
A method and system for detecting tampering of authenticated memory blocks that are accessible by an untrusted host processor, by (1) periodically re-authenticating the memory blocks from a trusted computing environment, and (2) disabling accessing of the memory blocks by the untrusted host processor when the re-authenticating fails. In one implementation, each of the memory blocks has an authentication code, and the accessing of the memory blocks is disabled by disabling the untrusted host processor. The memory blocks may be re-authenticated sequentially, or randomly, e.g., based on a random block selection based on the block location, or based on temporal randomness. The re-authenticating is preferably effected by an authentication module in the trusted computing environment.