Can smart door locks really prevent thieves?

An electronic card “drip” can open the hotel’s guest room; an electronic keychain facilitates access to the apartment’s door… Smart door locks are gradually replacing traditional mechanical locks, especially those with biometric identity Become the first choice for many families nowadays. However, everyone’s doubts about their safety are endless. Do these “suspects” make sense?

Is it true that the small black box is unlocked for a few seconds?

In May last year, at an international door industry fair, a lady opened a series of smart locks through a small black box. The shortest time was only 3 seconds. This news was not only in the industry, but also among ordinary people. A hot discussion. Insiders explained that the “small black box” is powered by a Tesla coil, which generates a strong electromagnetic pulse to attack the smart lock chip, causing the chip to crash and restart. Some smart locks will automatically unlock after default restart. “This is not guaranteed with the quality of some manufacturers in the fingerprint lock industry, and it is very cheap in terms of circuit board and fingerprint module design. This is also a marketing method for small black boxes. Many agents and peers have to buy one and get back. Test your own smart lock, the cost is only 10 to 20 yuan, but it costs 400 to 500 yuan, and everyone finds that they can’t open the lock.” In fact, as long as the fingerprint lock circuit board is slightly adjusted, it can solve this problem. . At present, the company’s smart door locks have been tested and proved to be unopened.

It’s a coincidence that the plastic card unlocks the phone.

Also last year, Ma Zhuo of Tencent Xuanwu Lab put a white plastic card over the smart door lock screen glass. When the fingerprint recognition module is running, the light from the bottom of the screen will reach the plastic card through the fingerprint on the screen. Then, it is reflected back to the receiver, and the receiver will mistake the fingerprint oil on the screen for the owner’s finger and unlock it. However, the case is still an example. The insiders explained that the fingerprint lock probe is divided into two types, one is semiconductor, which needs to be recognized by human perception, which can prevent fingerprinting and copying fingerprints, and the recognition rate is higher; the other is optical mode, which is equivalent to Take a photo and put the fingerprint on it before you can compare it with the photo before you can unlock it.

Some smart door locks have APP remote control unlock function, and many users will worry about hacking and other issues. Experts said that such a smart door lock is to work in conjunction with the smart home, but the network cable is unplugged at home, in an off-grid state, can be unlocked normally, and the data of the smart home is stored in the local cloud, which can also ensure that the user goes home as usual. unlock. In addition, the traditional keyhole is necessarily equipped with a smart door lock, and different types of door locks have different positions.

Iris lock, finger vein lock pending market validation

It is understood that the iris smart lock has been put into use in some high-end residential areas. The iris recognition distance of these products is 8~25 cm more than the traditional iris product 25~35 cm, and the lens autofocus can be realized, and the automatic recognition and capture user can be realized. eyeball. However, the price is between 5,000 and 6,000 yuan, which is still a relatively expensive product in the smart door lock industry.

At present, the most safe type of finger vein electronic lock in the industry is that the human biometric carrier vein is located inside the finger. Unless a living finger is copied, the blood vessel image formed by the flowing blood is difficult to obtain by ordinary technical means. Be copied. Finger vein identification does not leave a mark during use and is a true living body test. Although the related products have already landed, in the smart door lock industry, there is still a long way to go from being used by the public.

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