Patent · US Expired

Signature process

US6816971B2 · kind B2 · utility

21Cited by

3References

20Claims

0Family size

Assignee

Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Ernst Schmidt · Hager City, US
Burkhard Kuhls · Hersbruck, DE

Key dates

Filing date	Feb 26, 2001
Grant date	Nov 9, 2004
Priority date	—
Expiry date	May 2, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/84
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

In a process for ensuring the data integrity of software for influencing operation of a control unit of a motor vehicle, a pair of keys is provided for encrypting and decrypting electronic data. The first key is stored for access by a control unit in the motor vehicle, and software which is to be imported is signed by means of the second key. The signed software is imported into the memory of the control unit and the signature of the software is checked by means of the first key. The signature is accepted if the check has a positive result.

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