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:
Jun. 18, 1996
Filed:
Jun. 07, 1994
Jacques Patarin, Viroflay, FR;
Bull CP8, Louveciennes, FR;
Abstract
A process for authentication by an offline terminal (1) of a portable object (2) including a processing circuit (4) able to deliver a secondary value (Rx) which the function of a primary value (Qi) transmitted by the terminal. An authentication table (5) is placed in the terminal which associates a series of primary values (Qi) and a series of control values (Ui), each control value being the transformation by a oneway function of the secondary value (Rx) calculated by the processing circuit of an authentic portable object. At the time of a connection of a portable object with the terminal, one of the primary values (Qi) from the table is transmitted to the portable object, the one-way function is applied to the secondary value (Rx) received from the portable object, and the result obtained is compared with the corresponding control value (Ui) from the table.