Anti-theft system development PasslockⅢ, PasslockⅢ + and Ford SecuriLock (PATS), when, of course, other similar systems, began to use radio frequency identification technology using wireless transponder (RFID).

If the past few years a number of automotive technology is always in progress, then, automobile anti-theft technology can be counted as one of them. According to statistics, in 2003, in the United States about $ 8 billion worth of stolen cars, of which only about 65% of the car was eventually looking back. Canadian government departments is estimated that in 2003, Canada had 20,000 domestic car stolen, some of which have been shipped out of the country up.

In 1986, GM introduced the first car alarm system (Vehicle Anti-Theft System, abbreviated as VATS). So far, GM has developed a fourth-generation automobile anti-theft products. In the automotive sector, all the major car manufacturers in the US, Japan and Europe, the latest developed anti-theft system, available at the beginning must be prepared to meet the challenges and impact more advanced anti-theft technology.

Although early VATS GM's long passes, but objectively speaking, it is still a typical automobile anti-theft products year by other car manufacturers widely used. GM's initial VATS is an outstanding representative of the first generation of anti-theft system. This VATS car keys installed embedded resistors, when the car key into the lock, the lock within two fine line contact with the car keys to the internal resistance, anti-theft system and processing module can be read by the contact resistance value and compared to fixed resistance value set in advance. If the two match resistance, is allowed to start the engine. If you do not match, then only after 10 minutes before trying to start the engine again, and thus play a security role.

In 1996, VATS system is more popular anti-theft alarm system Passlock replaced. Passlock works and VATS is very similar, but the difference is that Passlock sense resistor embedded in the ignition switch. PasslockⅡ actually has two detection variables that need to detect two resistance values, but in essence, it still belongs to the anti-theft system based on the principles of the sense resistor.

When the anti-theft system development to PasslockⅢ, PasslockⅢ + and Ford SecuriLock (PATS), when, of course, other similar systems, began to use radio frequency identification technology using wireless transponder (RFID), most of this technology the basic principle is via radio waves to identify people or objects. RFID specific works is that when a radio signal generated by the radio transponder enters recognizable (read) region, the reader will immediately capture the signal, and then sent to a computer or other logic processor reflection modulation processing, reduced to an object or the person's information, so as to achieve the purpose of identifying the object or person. In fact, this works have been used in many of life's aspects, such judgment marathon players crossed the line order, the vehicle through a toll station will be without deceleration autotoll using plastic RF card needs to be checked by staff security doors, etc., application of this technology is a good example.

To RFID technology used in car anti-theft system, circuit-based car keys anti-theft system blocking system requires four main components. Wherein the core component is a wireless transponder, wireless transponder inside a non-internal battery-powered chip. In order to make the chip work, the need for external energy to provide power. Wireless receiver via a winding-shaped antenna generates high frequency magnetic field 134.2kHz of the magnetic field has energy capable of driving the wireless transponder microchip circuits and chips places in the form of electromagnetic wave signal modulated data stream is sent to the reader, then reader then converts it into data. Finally, control computer processing of these data, thereby performing management control.

Basic communication radio frequency identification system is divided into two kinds of full-duplex and half-duplex mode. In full duplex mode, the digital signal driver wireless transponder and a wireless radio wave energy generated by the transponder can be transmitted at the same time. In half-duplex mode of transmission is not both simultaneously. Wireless transponder by an energy storage capacitor circuit received. Once the radio wave transmission is stopped, the transponder can use the stored energy to send data.

Whether it is based on resistive anti-theft system is based on radio frequency identification security systems, there is always some criminals will find a way to break them. Remote engine start system manufacturers is one of the many anti-theft system by legal cracks. Suppose a careless owners will forget the car keys in the ignition, just use the manufacturers sold crack module plus remote starter, at least in the time required for starting the engine is enough to break up its anti-theft system