Recently, an article with no author and no source suddenly appeared on the internet, to the effect that "a magical little black box can open your fingerprint lock in three seconds, and has entered the market", causing panic and controversy among consumers and lock industry in Wuhan. On the 2nd, Hubei Lock Industry Association organized relevant experts to conduct field experiments, the results show that "small black box" is not as magical as the network article said.

"Small black box" can only open the fingerprint lock without modifying the initial password.

Mr. Wang, who works in Wuhan Branch of a well-known "Lock King" company in China, took out a black box the size of a BP machine and selected a fully automatic fingerprint lock that was said to be easy to open. Without initial setting, the lock bolt did quickly expand by pressing the current switch on the small black box.

Mr. Wang explained that without any settings, the fingerprint lock is in the initial state, using any fingerprint, any card or the initial password 123456 can be opened, using the tool to operate, is possible to unlock, because the tool generated current and magnetic field has been regarded as a kind of unlocking signal.

Mr. Wang set the fingerprint lock to unlock, and then used a small black box for testing, only the system alarm and system restart, did not appear unlock the situation.

Mr. Wang reminds consumers that after the installation of the fingerprint lock, it must be set to unlock the fingerprint, modify the initial password, so as to prevent.

Mr. Wang also used a small black box to test the fingerprint locks of seven regular brands on the market in Wuhan, and the results were exactly the same.

What is "little black box"?

Wang Jiannan, President of Hubei lock industry association, introduces the small black box is Tesla coil. The principle is that a Tesla coil is formed by winding a copper wire around a 9V battery and connecting a transistor with a resistor; when the switch is pressed, the coil cuts the magnetic field and generates an electric current. The current generates a magnetic field through the coil, and the magnetic field can transmit electric energy separately. When the magnetic field transmits electricity to the inside of the fingerprint lock, the internal circuit board chip is impacted with a strong voltage and current, causing the chip to crash, and then the chip restarts, so the lock is opened.

Some fingerprint locks use low memory capacity of circuit boards and chips, for high-frequency signals without protection, in strong voltage and current shock, the internal device instantaneous failure, resulting in open.

Wang Jiannan analysis, due to cost considerations, many inexpensive fingerprint locks in the circuit board design lack voltage regulator module, the core program does not protect the system restart function, restart, fingerprint lock is in the open mode; also does not have the current overload short-circuit protection function (equivalent to the ABS function of the car), encountered. Strong voltage and strong current shock will instantly fail. After installation, if there is no administrator password or fingerprint settings before use, the fingerprint lock is in the "naked run" state (any fingerprint, any card, the initial password 123456 can be opened).

Wang Jiannan suggested that consumers should try their best to choose big brand fingerprint lock, big brand manufacturers will choose real material when manufacturing, on the voltage regulator module, the core program restart protection and current overload short circuit protection and other important links will be strictly checked and tested.

Internet article is a typical dealer self speculation.

It is understood that the article mentioned in the network is "small black box" dealer, the cost of only a dozen yuan "small black box" in the market to sell hundreds of yuan, but also "self-blackout" and "alarm", claiming that only sold to "three people", is a typical self-hype.

Changjiang Daily reporters searched the headline for the origin of the article, which claimed to be "journalist", except for a few with the name of the portal website and one with the name of the local TV station website. All the other articles were forwarded by enterprise webpages or self-media. The news on the local TV station could not be found at all. Reporters in Taobao also can not find the sale of "small black box" (so-called "fingerprint lock testing tools") stores. In Wuhan West and Shundao Street two major home market, the reporter visited nearly 10 stores, and did not inquire about the "small black box".

Cheng Guobin, a senior lock official in Wuhan, said that Wang's alleged second fingerprint lock and some lock manufacturers offered rewards for unlocking people are actually "alternative propaganda" of the same nature.