With the development of automobile manufacturing technology, people are accustomed to referring to the tool opening the car doors and starting the engine as the key.
Pure mechanical lock keys
Automotive mechanical locks are the most common and the earliest automotive anti-theft locks, and are rarely used alone in mid and high end cars. The mechanical lock mainly plays the role of restricting the operation of the vehicle, and can provide limited help in anti-theft. Generally, car thieves can pick the steering wheel lock in dozens of seconds.
Electronic anti-theft lock keys
Electronic anti-theft locks are the most widely used and installed anti-theft locks. The main function of the one-way electronic anti-theft system is to open and close the car door, and some functions are provided for some products according to customer needs. Use the electronic remote control to start or stop the engine. The advantages of the electronic anti-theft system lie in its electronic password and remote control operation mode. When the car owner uses the remote control to open and close the door, the car thief hiding nearby can use the receiver or scanner to steal the radio waves or infrared rays sent by the remote control. After decoding, the car's anti-theft system can be opened.
Chip-type digital anti-theft lock keys
The chip-type digital anti-theft lock is an anti-theft measure, and most cars use this anti-theft method as the original anti-theft device. The chip type digital immobilizer can lock the motor, circuit and oil circuit of the car, and the vehicle cannot be started without the chip key. The digital password's repetition rate is extremely low, and the combination lock on the car can only be unlocked by touching the combination key, which eliminates the drawback of being scanned. Most of the domestic new cars have been equipped with the original chip anti-theft system.
Chip anti-theft has developed to the fourth generation. The latest fourth-generation electronic anti-theft chip has a special diagnostic function, that is, an authorized person can obtain the historical information of the anti-theft system when reading the secret key information. The number of authorized spare keys, time stamps, and other background information in the system becomes part of the transceiver's security features. The fourth-generation electronic anti-theft system is more effective than the previous electronic anti-theft system, but also has other advanced features. Its unique radio frequency identification technology (RFID) can ensure that the system can correctly identify the driver in any situation. When the driver approaches or moves away from the vehicle, it can automatically identify the identity and automatically open or close the car lock; whether inside or outside the car, the position of the electronic key can be easily detected.
The electronic key is the core component of the third-generation computer burglar alarm. A single electronic key can manage and check all user's installed alarms. The key adopts programmed design, LCD display, independent power supply, and easy operation. It is a tool for customers to modify passwords, unlock, and detect the status and function of the alarm.
Car theft is a common thing to be seen in various countries. Car manufacturers in various countries have been trial-producing various security and protection systems to prevent car theft. In 1994, Ford Motor Company of the United States proposed an electronic safety protection device called the Escot prototype. This is a ciphered electronic key that installs an ultra-small radio frequency identification pulse transceiver into the ignition key. This pulse transceiver is stored with an unchangeable electronic code number, and its electronic code number reaches 18 × 10. Each code corresponds to a specific car. The owner of each car has a standard key, and this key is used for shutting off the engine or equipping the key. The engine can only be started with a spare key formulated directly from the standard key. When the key is inserted and turned, the ignition switch is turned. When the key is inserted into the ignition key hole of the car, the reader will send out a pulse, which is transmitted to the pulse transceiver in the key through the antenna. The pulse transceiver can feed back its password number to the reader. The password is transmitted by wire to the control micro-component. The component compares the code number sent from the pulse transceiver with the code number stored in memory. If the two numbers match, the control micro-assembly connects the engine's control section to the fuel pump. If the two code numbers do not match, the car engine will refuse to start.
Many cars are equipped with electronic key locks, and they are all used in ignition locks, which further strengthens the function and anti-theft effect of automotive electronic anti-theft systems. Electronic key locks can be divided into two categories, including resistive electronic key locks and coded electronic key locks. The working principle of these two electronic key locks is the same, and both use a codec circuit.