Start by watching a movie and experience the technological sense of biometric technology | Gong Yazhuo Album

Recommended columnist for this issue of Leifeng.com: Gong Yazhuo, founder of Juhong Optoelectronics, PhD of Shanghai Jiaotong University, specializes in the field of biometrics, and has 15 years of experience in iris recognition research.

Gong Yazhuo's articles always use plain and easy-to-understand language to explain the advantages and disadvantages and principles of biometric technology (including face recognition, iris recognition, voice recognition, gait analysis, etc.), and interspersed with vivid examples, especially in the film aspect - he also brought a series of analysis of biometric technology in "Mission Impossible 5", which was very popular among readers. As a movie fan, every time I read such articles, I feel an incomparable sense of familiarity.

Leifeng.com will launch a series of reviews every Saturday. If you have any columnists or topics that interest you, please leave a comment and we will give priority to them in the next recommendation. So let's first review Gong Yazhuo's "Movies and Biometrics" journey (click on the following titles to read the article):

1. What are the biometric technologies behind Mission: Impossible 5?

Almost every "Mission Impossible" movie will cause a heated discussion in the field of biometrics. In "Mission Impossible 5", Ethan Hunt showed off a new technology - "retinal recognition": a camera was pointed at the right eye of the British Prime Minister, and as two red lights swept across, Ethan Hunt opened the "red box" that determines the fate of mankind. Compared with the iris, which is relatively more well-known, is the retina better? Which is the most favored high-tech in science fiction movies?

2. What’s the magic behind the “gait analysis” that gave Tom Cruise a headache in Disc 5?

The most thrilling scene in "Mission Impossible 5" is this: hacker Benji was completely desperate when he learned that he had to go through a "gait analysis system" to reach his destination. In the end, he could only rely on Ethan Hunt to hold his breath for 3 minutes and dive into the background data to forcibly break into the gait analysis system.

So what is the magic of the "gait analysis" technology that even the IMF agents cannot directly crack? What is its principle?

3. Only a tape recorder is needed to carry out the attack. How did Tom Cruise do it?

In the movie, Ethan Hunt repeatedly played a short recording of the British Prime Minister consisting of several words, and easily fooled the voice recognition system. The seemingly easy cracking process, which only required a tape recorder to complete the attack, made "voice recognition technology" not so dazzling in the science fiction blockbusters full of black technology.

However, in daily life, voice recognition technology is widely used in several biometric technologies, such as smart assistants like Siri. So to what extent can voice recognition technology change our lives? Does it really lack technical content?

4. The driver pretended to be Zhao Wei’s husband to sell a house. How did he deceive the facial recognition system?

After talking about movies, let’s talk about facial recognition.

Facial recognition has been popular in the technology circle for a long time, such as Alipay's facial payment, Microsoft's age identification website How-Old.net, Zhou Hongyi's Qihoo mobile phone facial recognition, and China Merchants Bank's facial recognition account opening... However, the latest big news is that Zhao Wei's husband Huang Youlong was sued because his driver Jin deceived the notary office's facial recognition system and sold Zhao Wei's family's mansion worth tens of millions as a client. Huang Youlong was unaware of the whole process and was "impersonated" by someone.

As soon as this report came out, confusion about facial recognition swept the general public. However, in the technology circle, there has always been analysis on the pros and cons of facial recognition. So is this technology good or not, and where should it be used?

5. Why doesn’t Windows 10 adopt the “best biometric technology”?

Windows Hello is a biometric authentication method used by Microsoft when launching Windows 10, allowing you to access your Windows 10 device by identifying biometrics. There are three ways to authenticate (fingerprint recognition, facial recognition, and iris recognition), among which facial recognition is the key project of Windows Hello. Microsoft said that in its internal tests, Windows Hello's false recognition rate for faces was only one in 100,000 (0.01%), and the rejection rate was 2% - 4%. However, with the development of cosmetic surgery technology, a person's appearance is indeed unreliable. And Microsoft obviously underestimated the power of twins. In the recognition test of 6 pairs of twins, Windows Hello misidentified 1 pair, with an error rate of 16%.

There are obviously better biometric technologies than facial recognition, so why doesn't Windows 10 focus on them?

This is the end of this issue's special issue for authors. Whose special issue do you want to see in the next issue? Let me know in the comments!