汽车防起动（immobilizer）.pdfVIP

Latest Generation Technology for Immobilizer Systems 1. Abstract Since the introduction of immobilizer systems the need for improved security constantly increases. Many Anti Theft Systems make use of Radio Frequency Identification (RFID) technology because of its unique features. RFID transponders can provide a high level of security at low cost. This article describes the system approaches for the first and second generation of immobilizer systems. It compares the various security levels and gives an overview about the latest generation technology, called crypto-transponders. 2. Introduction During 1993 the worldwide increases in automotive theft reached a level which was no longer acceptable for insurance companies. The German insurance companies forced the rapid introduction of a new form of security systems - immobilizers. In other regions various forces such as government agencies also started placing more emphasis on vehicle security. During a short time frame the automotive industry developed various systems to prevent thieves from entering and/or starting the vehicle. The methods chosen vary from country to country depending on consumer preferences. Remote keyless entry for example is preferred in the USA and in France whereas transparent systems are widely spread in the German market. Due to the unique features of RFI