Among the many trendy electronic devices on the car, the smart key system is very eye-catching. The keyless entry technology brings great convenience. The one-button start brings a full range of technological flavors, but only from turning the key to pressing the button. This change in action is enough to allow many bosses to spend a lot of money to buy some models that even have a top equipped with a smart key system.
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However, the definition and application of the smart key technology are different. How can it be regarded as a smart key system? Is the smart key system safe? Let us first analyze the "keyless entry" part of the smart key system.
From traditional keys to smart keys
Car keys of any age are used to open the doors and start the engine. As a car with high value and a certain danger in the use process, the key is especially important. The key to the early car was a piece of metal, screwing the key to open the door, and screwing the key to fire. Does not have any technology type. Later, some manufacturers integrated the identification chip on the key, which must be double-identified by the key and the chip to start the car.
Traditional mechanical key
Later, with the remote control key, the door lock can be turned on or off as soon as the remote control is pressed. The remote control is a wireless signal source that is in the same frequency band as the vehicle and can be turned on or off by issuing a command door. We can compare the command to a sentence and compare the frequency band into a language. It is like the remote control tells the vehicle "the sesame opens the door" in Mandarin, and then the vehicle opens. However, the vehicle remote control also takes into account the function of the key, and the commands of different models are also different. The languages ​​of different brands and representative frequency bands are also different. When the other owner's remote control issued the Cantonese "Bunny Opens the Door" command, it naturally cannot match or affect our car.
Folding remote control key that is popular all over the world
At present, many models are equipped with intelligent keyless entry system, which can be unlocked and ignited without leaving the key. RFID, the smart key of RFID technology, has a verification action during the process of opening the door. When the vehicle is in the locked state, it will continuously send out signals. When the smart key appears in the signal range, there will be a Respond to the completion of the checkmark behavior.
This is like a vehicle shouting "Tianwang Covered Tiger" every few seconds, and when the key is heard, returning a "Pagoda Town River Demon", ok, the check is completed, no need to take out the key, touch the door handle The button can be unlocked by a button or a button. Vice versa, when you leave the vehicle, the vehicle automatically locks and closes the window (some models do not leave the lock function, or require additional settings, please ask when you purchase).
Even smart keys still have traditional keys just in case
Many people see that there will be doubts at this time. What is the security while increasing the convenience of technology? Next, let's take a look at the security aspect.
On a vehicle without an anti-theft system, it is easy for the bad guy to drive away your car. Just like on TV, the violent one will open the window, destroy the ignition lock core, pull out a few lines, and pick it up. As the engine roars, this car will not belong to you. A bit of a tech-based, a series of tools will be used to get all the locks in a matter of minutes.
A variety of unlocking tools
The seemingly convenient remote control also brings convenience to the thieves. The early fixed-code remote control can only issue a code that cannot be called a password. With the development of technology, the thief has a tool to monitor the signal. . When your remote control yells at the car, "Sesame opens the door", of course, others can also hear it. When you are not there, the "sesame door" that has already been recorded is played back, huh, huh... the car is so arrogant. It is.
This is the new 2009 interception signal tool. With the development of technology, 11 models should be available.
Of course, this simple problem is hard to beat engineers, so the remote control is designed to use a rolling password, which is to set multiple passwords on the remote control, and the body receiving system also has a corresponding. The first time the lock was opened, “the sesame opened the doorâ€, and the second time it became “watermelon open the doorâ€, after which “crab†and “green tea†could open the door, which made the previous monitoring equipment not function and the safety was naturally improved. .
More advanced barcode cutting tools to analyze signal characteristics of different models
Then the thief who was angry and angry was out of a trick. Since I can't monitor your signal, I also let your signal not be transmitted. When you parked your car in the parking space and waved the remote control door, you didn't find that your car was not locked. The reason is that when your remote control says "the fritters are closed" in English, the bad thieves use signal jammers to yell "嘻唰唰嘻唰唰" and "sell my love" in various languages. The sound, so your car can't hear your "sticks close", so the door can't be closed. Moreover, as long as there is time and technology, it is not difficult to decipher the rolling password.
The box with three antennas in the middle is the signal jammer, which has the same principle as the signal shielding device of the mobile phone.
The keyless entry system locks the door in the opposite way to the remote lock. After turning on the unlock function (provided this function is required), when you leave the car with the car key, even if you do not issue a lock command, the car will be decisively locked after not feeling your presence. , do not give anyone a chance. As long as no one sneaked into your car during this time, it was basically safe. Although there is no shortage of violent means, which thief is willing to pick a difficult vehicle to challenge his skills?
Verify key process topology
Not only that, most smart keys use the encryption technology of the key. Unlike the rolling code, the encryption of the key can increase the encryption level and save the code time in the same amount of information. As a simple example, we can use the "letter position minus 1" key to convert "zhimakaimen" into "yghlzjzhldm", a code that is not easy to crack. So when the smart key sends the "Ren-o-zmj1- yghlzjzhldm" command to the vehicle, the vehicle will know the message "Ren user requests to open the door - decrypt yghlzjzhldm with zmj1 key". Of course, this is just an analogy. The actual encoding and decoding process is very complicated. The cooperative work of rolling code and key really makes the difficulty of cracking greatly increase, ensuring security.
summary:
The keyless entry system provides full convenience while ensuring safety. In recent years, the remote control key of the listed model also has a key encryption mechanism, and the security is greatly improved compared with the previous one. In the next section, we will introduce the start-up section of the smart key system to understand the startup and safety of the different models, as well as the extra features and common problems of the smart key system.
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