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:
Nov. 22, 2011
Filed:
Mar. 08, 2007
Applicant:
Marc Joye, Saint Zacharie, FR;
Inventor:
Marc Joye, Saint Zacharie, FR;
Assignee:
Gemalto SA, Meudon, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A cryptographic operation includes calculating a multiplication of an element of an additively denoted group by a scalar. After two registers R+R, are initialized, iterations are carried out over the components Kof the scalar K. If Kof the scalar equals 0, then the value in register Ris replaced by 2(R+R) If Kequals 1, the value in register Ris replaced by 2(R+R). At the end of the algorithm, the value of the register Ris returned as the calculated result. This method poses the advantage of carrying out a calculation of multiplying by a scalar by carrying out only doubling and adding operations of the type 2(A+B).