Patent · US Active

Method for creating a secure counter on an on-board computer system comprising a chip card

US8082450B2 · kind B2 · utility

211Cited by

11References

9Claims

0Family size

Assignee

Logic Co., Ltd. · FR

Inventors

Alexandre Frey · Hamburg, DE
Dominique Bolignano · Paris, FR
Axelle Apvrille · Valbonne, FR

Key dates

Filing date	Dec 14, 2006
Grant date	Dec 20, 2011
Priority date	—
Expiry date	Nov 18, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/80
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

According to the inventive method, the chip card, a counting function (FC), a counter (Cpt) and a private key (Cf) stored in the write-only part of the memory region are stored in a persistent memory, the counter and the private key (Cf) being accessible only by the counting function (FC). When the chip card receives a counter request emitted by an requesting entity (ER), the counting function (FC) performs a modification of the counter (Cpt) and a calculation of a signature, and sends a response to the applicant entity (ER). When the on-board system receives the response to the counter request, the signature contained in the response is checked.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.