Speaking of fingerprint lock cracking, everyone has seen a lot, and there are many on TV, but is it really that easy to crack? It is also said that orange peel can crack fingerprint lock, which is amazing, but whether it can be cracked or not is still a question. Let’s take a look at it with Xiaobian to see if the fingerprint lock is safe.
1. Can the orange peel cracked by fingerprint lock be cracked?
The reporter can’t open the smart door lock through various means such as inkpad, photo and fingerprint film. Then, why can the fingerprint on the mobile phone be cracked by orange peel, but the smart door lock can’t be unlocked by the copied fake fingerprint?
At present, the most common fingerprint collection technologies are optical and semiconductor.
At present, optical fingerprint identification mainly uses attendance machines and some low-cost smart locks, while semiconductor fingerprint identification technology is widely used in mobile phones and most smart locks.
Although both smart phones and smart locks use semiconductor fingerprint recognition, in fact, the resolution and area of the fingerprint recognition area of mobile phones are small and the recognition accuracy is low, so they will be deceived by orange peel to unlock.
The fingerprint collection area of the second-generation ID card of the Ministry of Public Security is 12.8-18mm, and the fingerprint chip collection area used by smart locks is mostly between 8x8mm and 11×11 mm. Some high-quality smart locks have fingerprint recognition size even equal to the fingerprint collection area of ID cards, so the natural security performance is the best.
Second, is the fingerprint lock of the security door safe?
Most of the early fingerprint locks used optical fingerprint heads, that is, the fingerprint collection window glowed with green, blue or red light, and the most common one was the fingerprint punch (fingerprint attendance machine). The technical principle of the optical fingerprint head for collecting and identifying fingerprints is that light shines on the concave-convex fingerprint through the prism, and a total reflection is formed at the concave part of the fingerprint to obtain a higher brightness information, while a diffuse reflection is formed at the convex part of the fingerprint, and the reflected light intensity is weak. Finally, the light information is processed to verify the identity corresponding to the fingerprint.
This principle shows that the optical fingerprint head also needs a three-dimensional fingerprint model to be scanned correctly, so some fingerprint patterns obtained by pictures, fingerprints left in daily life, fingerprints left in contract documents, etc. are mostly planar 2D fingerprints, and even if the fingerprints are copied and output by a laser printer with extremely high dpi, they cannot be recognized by the optical fingerprint head, which is also proved in related experiments circulating on the Internet.
Even if the obtained fingerprint is inverted with silica gel and made into a three-dimensional fingerprint film, it is difficult to get away with it. Because the fingerprint obtained by others through the above means only gets the grain pattern of the fingerprint, but it can’t get the exact distance difference between the grooves and ridges of each part of the owner’s fingerprint, so it is impossible to make a relatively accurate fingerprint.
So, can the optical fingerprint head be successfully copied? The answer is yes. However, this requires the owner to actively cooperate with others to take the fingerprint. For example, in the video of "Curious Lab", the owner obediently presses his finger on the plasticine for a few minutes to let others get the fingerprint model, and then uses silica gel to reverse the mold to make a fingerprint similar to the owner, so that the fingerprint lock can be successfully cracked.
But in this case, in real life, who will obediently cooperate with non-hair molecules to take their fingerprints like this? Some people will say that the owner can steal his fingerprints without being known if he is drunk or fascinated. This problem is really unsolvable for a small optical fingerprint lock. However, the so-called magic is one foot high and the road is one foot high, including many fingerprint lock manufacturers. In order to solve this unlikely security risk, semiconductor fingerprint heads are advocated to replace optical fingerprint heads.
After reading the above introduction, it is clear to everyone whether orange peel can crack the fingerprint lock! For the security of fingerprint locks, in fact, we don’t have to worry too much, it is definitely better than ordinary locks, so we should pay more attention to the norms when using them. Want to know more home information, please continue to pay attention to home after-sales service master Wan.
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