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:
May. 24, 2016
Filed:
Nov. 07, 2014
Elliptic Technologies Inc., Kanata, CA;
Michael Kenneth Bowler, Ottawa, CA;
Other;
Abstract
A system for protecting the integrity of a memory system maintains an age counter and an opportunity counter for each of multiple memory blocks; maintains an epoch counter for the memory system; writes data in a selected memory block; increases the local sequence number of the selected memory block; updates the opportunity counter for the selected memory block if the local sequence number of the selected memory block rolls over; computes a message authentication code (MAC) in the selected memory block based on a global sequence number and the local sequence number; updates the age counter and the opportunity counter for any non-selected memory blocks if the opportunity counter for the non-selected memory blocks does not match the LSB of the epoch counter for the non-selected memory blocks; and computes a new MAC for any memory block for which the updating is performed.