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:
Apr. 30, 2019
Filed:
Aug. 31, 2015
System and method for one-time chinese-remainder-theorem exponentiation for cryptographic algorythms
Applicant:
Gemalto SA, Meudon, FR;
Inventor:
David Vigilant, Meudon, FR;
Assignee:
GEMALTO SA, Meudon, FR;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01); G06F 7/72 (2006.01); G06F 7/556 (2006.01); H04L 9/30 (2006.01);
U.S. Cl.
CPC ...
H04L 9/004 (2013.01); G06F 7/556 (2013.01); G06F 7/723 (2013.01); H04L 9/003 (2013.01); H04L 9/302 (2013.01); G06F 2207/7261 (2013.01);
Abstract
A system, method and computer-readable storage medium with instructions for protecting an electronic device against fault attack. The technology includes operating the electronic device to determine two half-size exponents, dp and dq, from the exponent d; to split the base m into two sub-bases mp and mq determined from the base m; and to iteratively compute a decryption result S by repeatedly multiplying an accumulator A by m, mp, mq or 1 depending on the values of the i-th bit of dp and dq for each iteration I'. Other systems and methods are disclosed.