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:
Oct. 04, 2016
Filed:
Jul. 29, 2014
GM Global Technology Operations Llc, Detroit, MI (US);
Stephan Huang, Carmel, IN (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A vehicle diagnostic communication system and a method of establishing a secure diagnostic session at a vehicle is disclosed. The method includes the steps of: providing a seed value from an electronic control unit (ECU) to a vehicle diagnostics tool; determining a first challenge response at the diagnostics tool, a remote server coupled to the diagnostics tool, or both, wherein the first challenge response is calculated using the seed value and one or more iterations of a key derivation function; providing the first challenge response to the ECU; and if the first challenge response is validated at the ECU, conducting a diagnostic session between the diagnostics tool and the ECU.