Release date: 2017-11-10

In the movie "Minority Report" starring Tom Cruise in 2002, criminals used the identity of the iris left by Tom Cruise to send him a large amount of pictures and information that interfered with his normal work. Such scenes were divided into sci-fi plots at the time.

Now that iris recognition has become a reality, a few days ago, eye white was also announced to be able to identify people, even if identical twins can be distinguished. The eye pattern recognition technology was developed by biometric technology startup EyeVerify, which was later acquired by Ant King for $70 million and was renamed Ant Zorro in October.

The eye pattern is the texture of the blood vessels in the white area of ​​the eye. Each person's eye pattern is unique, so it can be used as a biometric to identify an individual. According to reports, under sufficient visible light, the user naturally looks at the front camera of the mobile phone to perform eye pattern recognition, instead of requiring a special camera like iris recognition. However, this technology has not solved the interference factors such as eyeball reflection, blinking, eyelashes, etc. It is now in the laboratory product stage.

In contrast, iris recognition has been used in real life. The Samsung Galaxy S8 has built-in iris recognition technology, which requires the user to recognize the system in a specific posture before it can be recognized. It is not convenient enough, which makes it not practical.

Iris recognition of the Samsung Galaxy S8.

The most exposed in life is fingerprint recognition. In 2013, fingerprint recognition appeared in the iPhone 5s and was called “useless design” by many people, but now it has become the security line of most mobile phones. According to data provided by Fingerprints, in 2016, a total of 1.6 billion mobile phones were sold worldwide, and 60% of them have fingerprint recognition technology.

Now, Swedish biometrics company FPC (Fingerprint Cards) is researching a technology called screen fingerprinting, which puts the fingerprint recognition module under the screen of the mobile phone and detects and compares the signal reflected by ultrasonic or active infrared light. For the fingerprint texture, and then complete the steps of identifying the identity, unlocking the mobile phone, and the like.

A mobile phone equipped with this technology can recognize fingerprints anywhere on the entire screen of the mobile phone. In addition, it has no hard requirements on the material of the screen, and both LCD and OLED screens can be used. If this technology is mass-produced, it is an improvement in convenience and manufacturing cost.

Apple iPhone X was released a few days ago and Face ID became popular.

Apple facial recognition is achieved by a small area of ​​the iPhone X that is not covered at the top. The infrared lens, flood illuminator and dot matrix projector can project invisible light to the face, forming an attachment. The user's 3D face map is compared with the owner's face image stored on the phone. If it matches, the phone can be unlocked. Apple said that the Face ID has a false match rate of one in 1 million and is 1/20 of the Touch ID.

Apple demonstrates the principle of Face ID.

In fact, if the accuracy requirements are not so high, the cost of face recognition can also be very low. It is said that the current low-end product licensing fee for face algorithm deployment in the market is about 500 yuan. Some time ago, Gome launched a smart phone S1 with facial recognition, priced at only 1299 yuan; ZTE launched the Blade A3, priced at 799 yuan.

The human voice is also used as a biometric identifier because of its unique characteristics. It recognizes that the most common application is personal privacy protection. For example, WeChat has a built-in “sound lock” function to protect user accounts from being stolen.

But its greater use is in smart speakers. Imagine if your smart speaker can accurately identify the voices of more than a dozen people in your home, it can play his favorite "Sunset Red" when Grandpa speaks to it, and turn on the lights in her room when Mom wants to sleep. .

At present, voiceprint recognition is still in its infancy, and Amazon's Echo launched the Echo II, which recognizes dozens of sounds in October. The domestic Tmall Elf and the cymbal speakers also have the function of voiceprint recognition.

The palm is also used as an authentication tool. Some time ago, American startup Redrock Biometrics announced that they had made a technology that could complete the authentication with a wave of hands. It takes advantage of the uniqueness of the human palm print, which can be verified with a normal camera and CPU processor, and the entire process takes only 10 to 100 milliseconds.

And these biometrics are faced with privacy issues caused by low accuracy.

After the Samsung Galaxy S8 came out, the German hacker Chaos Computer Clubs did an experiment. They took a person's iris with a 200 mm lens at a distance of 5 meters, and then fine-tuned the contrast between the photos and the darkness. Print the person's eye pattern with a laser printer and attach a contact lens to mimic the curvature of the eye. The experimenter used this fake glasses to face the iris recognition lens of the Samsung Galaxy S8, and the phone was unlocked.

New York University and Michigan State University have also published a report that found that smartphones can easily be fooled by electronic fake fingerprints. In the experiment, university researchers developed a series of simulated fingerprint MasterPrint, which matched the real fingerprint with the phone to 65%.

Sample fingerprints used by researchers at New York University and Michigan State University to compare with the so-called MasterPrint. The fingerprint with black solid lines on the fingerprint is the fingerprint that has been successfully matched with MasterPrint.

People are also worried that mobile phone companies will take their personal information. On the third day after the release of iPhone X, Apple CEO Cook received a questioning letter from Frank Sen, chairman of the US Senate, the chairman of the Privacy, Technology and Legal Justice Committee, about facial data protection. In response, Apple said that the entire identification process is carried out on the mobile phone, and the company does not have the user's facial data information.

The parts with unique characteristics are used for identity identification. In the end, it is because the mobile phone stores more and more personal information, and it seems to have become a part of people. Excessive intimacy creates privacy issues, which seems like an infinite loop, but people are still trying to unlock it.

Source: Curiosity Daily

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