With the development and innovation of technology, fingerprint recognition has become very popular, because it is very convenient and safe, and the author saw the "ant man" movie, a very hot film a few days ago. The scene in the movie made me ponder. The protagonist easily re-engraved a fingerprint through some commonly used tools in the home, and successfully unlocked the ability to obtain, and in real life, we can not through some very simple way to crack the fingerprint lock it? To this end, Xiao Bian collected a number of rumors or methods on the Internet and major forums to test and see if the fingerprint identification of the mobile phone is really as safe and reliable as the friends and businessmen promoted, or whether it is worth mentioning.
Before the test begins, we first come to the principle of fingerprint recognition module:
Fingerprint recognition principle
The commonly used fingerprint recognition module is divided into three types, which are optical inductive, capacitive and pressure sensitive fingerprint identification modules.
Three kinds of fingerprint identification module schematic
Optical Inductive: Record and verify fingerprints by light reflection imaging. Mostly used for fingerprint punching machines and notebooks and other equipment.
Capacitance: To record and verify the fingerprint by recognizing fingerprint lines by touching the skin and the screen. Mostly used for mobile phones.
Pressure Sensing: Imaging the sensor by sensing the semiconductor pressure-sensitive material. More used in factories and other more compact equipment.
Here to explain, now the fingerprint recognition of mobile phone brands are mostly capacitive fingerprint recognition module, please know! Please see the positive film below.
Materials required for all methods: 1 finger, 2 clear plastic, 3 plasticine, 4 silicone rubber, 5 ink
material
Method 1: Get a fingerprint on the plasticine by tapping it with your finger, fix the fingerprint with transparent glue, and then unlock the phone.
Expected rumors success rate: 30%
Fingerprint finished product
The above figure is a copy of the finished product fingerprint. We can see that the transparent glue is simply pasted and the fingerprint can be well presented, but can it be unlocked? Please look back.
The copied fingerprint can be used for normal entry
Test results (parameters measured: Charm blue metal, Jinli M5 plus, 360 God Note3, Cool front is still MAX)
Test results: After three series of small tests and one finger test, the results show that: First, the plasticine can trigger fingerprint unlocking, but it does not unlock the phone, and the phone that entered the plastic fingerprint is unlocked using plasticine. It still failed. The reason for the failure is that the plasticine is too flexible and easily deformed, resulting in deformation of the engraved fingerprints and unlock failure. For the contrast between pre-fingerprint and post-fingerprint recognition, we find that pre-fingerprint recognition is very easy because the recognition module is on the front, and the post-fingerprint unlocking is generally concave and difficult to respond to recognition. In summary, the method One is failure. But it also shows that if criminals get your fingerprints, there is still a chance to unlock your mobile phone through an extremely simple method.
Method two: Contaminate the fingerprint with black ink, and then obtain the fingerprint with transparent glue. After trimming, try to unlock.
Expected rumors success rate: 40%
Fingerprint finished product
It can be seen that this method is similar to the above method. The biggest difference is that "method 1" is printed with plasticine and has a 3D texture. The fingerprint printed by this method is only applied to transparent plastic. There are no 3D lines. However, compared with the previous method, because the ink is added, the fingerprints appear more clear. What is the effect of the fingerprint thus produced? Let's try it.
Test results (parameters measured: Charm blue metal, Jinli M5 plus, 360 God Note3, Cool front is still MAX)
Test results: The results of this method are similar to the previous method. First of all, for the sensitivity of the fingerprint recognition module Xiaobian to give a praise, even if this no engraved fingerprint fingerprint can still be identified, and the result is still the same, although it can identify, but still can not unlock. Is there still black technology in fingerprint recognition? Even if the lines are very clear, several attempts have failed, and Method Two has also failed.
Ultimate test: production of silicone rubber film cracks Fingerprint Fingerprint unlocked
Detailed steps:
1. First, use cardboard or other non-textured items to pinch the dough, and then use your fingers to press into the plastic mud to form lines. If it is clear, proceed to the next step. If it is not clear, repeat the above steps.
2. Then gently squeeze the prepared silicone rubber into the pattern pit you pressed out with the fingerprint, and then wait for the silicon rubber to harden, then you can get the fingerprint film.
Expected rumors success rate: 60%
Making & Making Successful Fingerprint Films
Part of the model test results (parameters measured: Charm blue metal, Jin Li M5 plus, 360 God Note3, Cool front is still MAX)
Test results: It is totally different from our expected success rate. Tests show that although this method is very high for optical fingerprint punching machines (嘘!), it has absolutely no effect on fingerprint recognition mobile phones. As for the reason for the failure, we believe that because the lines formed by silicone rubber do not have bio-static electricity unique to us, the fingerprint identification module of mobile phones cannot perform normal identification work. Therefore, the security of fingerprinting is worthy of recognition.
Article Summary: After the above experiments, we can conclude that the plots that appear in the film are actually not realized in real life. For consumers, the fingerprint identification function is safe enough for us to rest assured that the security and convenience it brings to life is unmatched by other functions. With the maturation of the fingerprint recognition module technology, the price of the fingerprint identification module has become very close to the people. It is hoped that each mobile phone brand can introduce more fingerprint identification functions, so that the fingerprint recognition function can be introduced into millions of households, allowing consumers to access anytime and anywhere. Can enjoy the change of fingerprint recognition to life.
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