＂Brush face＂ has been out. The latest unlocking method ＂Brush heart＂ has been vacated.

　

　

　　Still talking about "brushing your face"? It’s already "out" Not long ago, a brand-new biometric system — — The cardiac activity cipher system came out quietly. As a new member of the biometric system family, the latest unlocking method relies on everyone’s unique heart activity, so users don’t have to endure the original complicated password system and directly "brush their hearts". The next generation of identification system directly uses the "heart" to unlock the lock. In the future, you deserve it.

　　Text, map/Guangzhou Daily All-Media Reporter Huang Wei

　　[New Discovery]

　　"Brush face" has been born out of "brush heart"

　　For users, data security is becoming more and more important. In addition to passwords, different biometrics are now introduced to increase user security, such as fingerprints, face recognition and voice. Some time ago, face-brushing technology was once hotly discussed. Apart from unlocking the mobile phone, we can feel the "sense of technology" brought by the face recognition system, whether it is the ticket inspection recognition of the railway system or the identification of the marathon runners.

　　While experiencing the convenience of "brushing your face", everyone keeps asking "questions". For example, compared with the fingerprint recognition function, although the face recognition system looks more accurate, it is often unable to be accurately recognized because of subtle changes in external characteristics. So people who love to study constantly challenge the "face brushing" technology with photos, twins and 3D models of faces. The power of science and technology always pushes the waves ahead, and the next latest biometric identification may be better, that is, "heart identification."

　　Three years ago, a Canadian research company developed a biotechnology wristband, which can identify the wearer by scanning the heart activity and unlock the use of daily necessities. This special wristband has two sensing areas, one is inside the wristband and is in direct contact with the wrist skin; The other is outside the wristband. When the wearer puts his finger on an external sensor, the wristband will scan the heart activity to confirm the user’s identity, just like an ECG device.

　　It sounds like a sports watch or bracelet that we can measure the heart rate now. From fingerprints, irises to voiceprints, from "brushing face" to "brushing brain" to "brushing heart", it is undeniable that human biometric data has unparalleled particularity, and the biometric field has been very lively in recent years. However, when you think that this is the whole of "heart recognition", the more powerful is yet to come.

　　Identification system capable of continuous monitoring

　　The biotechnology wristband developed by Canadian research company mainly uses electrodes to measure electrocardiogram, so it needs direct contact with human body, which is inconvenient to use. Not long ago, researchers at the University of Buffalo spent three years creating a more convenient identification system — — Without direct contact with the human body, we can identify the identity by analyzing the geometric characteristics such as the shape and size of the heart and the fluctuation of the heart by radar long-distance scanning. The researchers hope that this device can use the shape and size of the heart and the beating frequency as signs to identify individuals. It is worth mentioning that after detecting the user’s heart, this system will continue to monitor to ensure that no one else breaks into the equipment or system that the user needs to guard.

　　The security of "heart recognition" lies in that it can be further enhanced by constantly monitoring users, such as automatically sensing and locking when users leave; The advantage is that it is not easy for others to know how you unlock it, because everyone’s heart is unique. The advantages of this identification system were also discovered by the research team of the State University of New York at Buffalo. They created a system to evaluate the user’s heart by using Doppler radar, and analyzed the changes of the heart in different movements through the microwave signals bounced from the heart. The whole analysis process only took about 8 seconds. Using the collected data, such as the shape, size and moving mode of the heart, we can create a unique identity for the user.

　　Using a unique heart to create a unique identity ID sounds very "existential". However, while we admire the progress of science and technology, we must also realize that how safe biometrics can be, how dangerous it can be. Can "heart recognition" really stop us from being "recognized" from now on?

　　[Expert voice]

　　Biometrics will gradually

　　Replace bank password

　　In this world, there are no people with exactly the same heart characteristics. As long as there is no serious heart disease, the shape of the heart will hardly change under natural circumstances. But for the same person, will the heart never change?

　　Some experts have questioned this, saying that human heart activity will fluctuate with age or physical activity, which will affect the identification of the system. There is no denying that this is a question that everyone will be interested in — — With age and physical activity, will it significantly affect our heart activity? And is our daily heart rate data relatively fixed?

　　In this regard, the reporter interviewed Ding Chunhua, director of the Department of Cardiology, Peking University Aerospace Center Hospital. "The position, size and pulsation of each person’s heart change with heart rate, physical activity, age and health, and of course it is relatively stable in the short term." Director Ding said that our heart rate mainly changes with the intensity of daily activities, and the heart can beat from 60 to 70 times per minute in peace to 130 to 150 times per minute during exercise.

　　For the heart recognition system, the biggest "soft spot" lies in the recognition error when the heart suddenly breaks down. In addition, the sensitivity of Doppler detection may be affected by people’s fatness, clothes they wear and the shielding of the lungs from the heart. Just like "face brushing technology" meets "twins", the heart recognition system also has the difficulty of improving recognition; Whether this "difficulty" is formed is a test of our health.

　　In the future, biometrics will gradually replace bank passwords. In other words, if the heart recognition system can be widely used, what we need is a set of "stable" heart data. Director Ding told reporters that the health of the heart needs to pay more attention to developing good health habits, such as quitting smoking and drinking, eating a low-salt and low-fat diet and exercising moderately.

　　[topic extension]

　　"Composite Biometric Technology" will replace "Single Biometric Technology"

　　Once upon a time, passwords composed of symbols and numbers were the best guards of security barriers, but now this traditional "secret" method seems to be outdated. And those human biological data that we are born with are like keys to unlock the body code, which can accurately locate everyone in the vast sea of people. Seeing the owner’s face, the door opened automatically; Give an instruction orally and the bill will be settled automatically … … In addition to face recognition and voiceprint recognition, there is even a "taste print recognition technology" with special functions, which is often applied to — — As long as you go to the crime scene to filter, concentrate and save the air, and then smell the suspects one by one with an electronic nose or a police dog, after comparison, you can accurately lock the criminals. "The smell of your body will reveal your secret" is no longer a joke.

　　Not long ago, Visa, a payment processing giant, launched a new platform, allowing banks to apply various types of biometric technologies, including fingerprints, faces and voices, to credit card applications and payments. Although almost every bank is interested in this technology, many people are worried about it. There is no denying that human biological data is very special, but if it is stolen, it may cause permanent harm. Therefore, for banks, the combination of biometric technology and traditional mode, multi-recognition technology (such as the combination of face brushing and voice brushing), and input of reserved mobile phone number and password may effectively improve the security of operations such as withdrawal.

　　All success will not happen overnight. At least in the short term, biometrics will not completely replace the traditional identification technology, but will be the assistance and supplement of traditional methods such as passwords. Experts say that in the future, composite biometric technology will gradually replace single biometric technology, and people can use the most user-friendly, efficient and safe identification methods for different application scenarios.