Browse Publications Technical Papers 2000-01-1310

Remote Entry Control and Immobilizer System Solutions 2000-01-1310

This paper describes the different data processing methods and crypto algorithm principles of access/drive authorization systems used in modern vehicles. The various communication sequences between keyhead/ keyfob and vehicle are detailed. Some possible attacks by thieves on a remote entry control system and the countermeasures required are discussed. Illustrations are given for a system overview, RF-receiver modules, bandwidth comparison, range performance, assembly of a plastic transponder, immobilizer module, “rolling-code” and “challenge & response” principle


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