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:
Aug. 18, 1992
Filed:
Oct. 09, 1991
Louis C Guillou, Rennes, FR;
Jean-Jacques Quisquater, Brussels, BE;
U.S Philips Corporation, New York, NY (US);
Abstract
A method and system for authentication of accreditations and of messages with zero-knowledge proof and for the signing of messages, and a station for use in such system, in particular executed as a smart card station. Instead of using multiple accreditations and an iterative process of verification, use is made of a comprehensve accreditation (high exponent p) and a number D is drawn at random, which number is within the range between 0 and p-1. The operations of verifiction proceed by the computation of the D-th power of the inverse accreditation B. Application in particular, to smart cards and, more specifically, to bank cards.