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. 04, 2005
Filed:
Nov. 04, 1999
Pascal Cooreman, Marseilles, FR;
Pascal Cooreman, Marseilles, FR;
Gemplus, Gemenos, FR;
Abstract
The invention concerns a method enabling a smart card and a terminal whereto it is connected to authenticate each other. The invention is characterized in that at the end of each transaction the terminal calculates, from data representing the card at said transaction end, a secret code CSCwhich is recorded in a zone ZCSC with unprotected access in the card memory and an authentication certificate CAwhich is recorded in a zone ZCA with protected access of the memory by presenting a secret code CSC. At the next transaction, the terminal calculates, by means of data contained in the card, a secret code and an authentication certificate which are compared to those previously recorded to perform authentication. The invention is applicable to smart cards.