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:
Feb. 14, 2017
Filed:
Nov. 11, 2013
Applicant:
Cryptography Research Inc., San Francisco, CA (US);
Inventor:
Joshua M Jaffe, San Francisco, CA (US);
Assignee:
Cryptography Research, Inc., San Francisco, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F 21/00 (2013.01); H04L 9/32 (2006.01); H04L 9/00 (2006.01); H04L 9/14 (2006.01);
U.S. Cl.
CPC ...
H04L 9/3247 (2013.01); H04L 9/004 (2013.01); H04L 9/14 (2013.01); H04L 9/3252 (2013.01); H04L 2209/24 (2013.01); H04L 2209/72 (2013.01);
Abstract
Methods and devices disclosed herein use techniques to resist glitch attacks when computing discrete-log based signatures. The methods and systems described herein replace the random nonce in conventional signature systems with a pseudorandom nonce derived in a deterministic way from some internal state information, such as a secret key or a counter, such that the nonce is not repeated. The methods and systems described herein may also use tests to verify that a glitch has not occurred or been introduced.