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:
Jan. 19, 1999
Filed:
Oct. 16, 1996
Applicant:
Inventors:
Henri Gilbert, Bures sur Yvette, FR;
David Arditti, Clamart, FR;
Assignee:
France Telecom, Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04K / ; H04L / ;
U.S. Cl.
CPC ...
380 28 ; 380 23 ; 380 25 ; 380 30 ;
Abstract
A cryptographic process is for protection against fraud. An allocation of a secret key K is made to a card and to an application and an input value R is defined. The card and application calculate the modulo 2 scalar product of binary vectors constituted by words of R and words of K. The application checks whether the result obtained by the card is in agreement with its own result. An exemplary application is low cost cards.