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:
Aug. 07, 2018
Filed:
May. 20, 2016
Synopsys Inc., Mountain View, CA (US);
Michael Kenneth Bowler, Ottawa, CA;
Synopsys, Inc., Mountain View, CA (US);
Abstract
A method and system for protecting the integrity of a memory system. An age counter and an opportunity counter are provided for each of multiple memory blocks. An epoch counter is provided for the memory system. Data is written in a selected memory block which increases the local sequence number of the selected memory block. The opportunity counter for the selected memory block is updated if the local sequence number of the selected memory block rolls over. A message authentication code (MAC) is generated in the selected memory block based on a global sequence number and the local sequence number. The age counter and the opportunity counter are updated for memory blocks when the opportunity counter for the memory blocks matches the LSB of the epoch counter. A new MAC is generator for any memory block for which the updating is performed.