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News

Facial recognition helps smart door locks grow bigger and stronger

  • Author:HFSecurity
  • Release on :2020-01-07
[Abstract]

In the current market pattern of smart door locks, fingerprint locks account for more than half of the market, in addition to password, remote control, NFC swipe, face recognition and other solutions. What really achieves a good user experience is the fingerprint and face recognition solution. At present, the mass popularity of fingerprint locks is a gradual education process for users' habits. Consumers are accustomed to going out without a key and a house card.

Ever since biometrics entered the home sector, smart door locks have always been a popular application scenario. According to the data learned by the Intelligent Door Lock Research Institute, about 15 million smart door locks purchased by Chinese consumers in 2019, smart door locks have become an important category that cannot be ignored in the field of electronic products. According to forecasts, by 2021, China's smart door lock market is expected to exceed 50 billion yuan.

In the current market pattern of smart door locks, fingerprint locks account for more than half of the market, and there are also solutions such as passwords, remote control, NFC swipe cards, face recognition, and so on. What really achieves a good user experience is the fingerprint and face recognition solution. At present, the mass popularity of fingerprint locks is a gradual education process for users' habits. Consumers are accustomed to going out without a key and a house card.

Security concerns

The rapid expansion of the market size is accompanied by various negative news. For example, the fingerprint recognition is not secure enough. Tencent's security team cracked the fingerprints. Face recognition is easy to be cracked by photos, videos and other news. Another technology company used masks to crack terminal products such as Alipay, which caused widespread industry attention and discussion.

Security and privacy are closely linked. Consumers will definitely consider this factor when they choose to pay for it. Industry standard makers and government authorities are also continuously consulting industry opinions and promulgating regulations to regulate the use of biometric products and Safety requirements.

Market pain points

The introduction of face recognition in the field of smart door locks has only begun to appear in the past year. The widespread use of check-in access control and access gates has made consumers no longer unfamiliar with face recognition itself, but there are several differences in smart door locks. The needs of the scene make the introduction of face recognition technology more complicated:

1) Sensitive power consumption: According to industry norms and national standards, battery power is indispensable. The door lock cannot be powered by an external power supply. This is significantly different from access control and gate products, which restricts the use of many technologies. For example, the display cannot be easily integrated into a door lock due to excessive power consumption. Similarly, face recognition products also need relatively large power consumption to support, how to ensure the use experience, and at the same time long-term standby without changing the battery is a very big challenge.

2) Security sensitive: Access control and gate systems belong to the public domain, such as office buildings, high-speed rail stations, customs, etc. Various technical measures such as security measures and camera monitoring are relatively complete, and it is relatively difficult to implement technical cracking and attacking methods. However, home smart door locks belong to the scope of personal privacy. If the threshold for being cracked and attacked is relatively low, it will be difficult to prevent and will cause relatively obvious losses with serious consequences. Adequate security threshold is an important guarantee that the product must promise to consumers, which is why the common use of ordinary cameras for identification is no longer in the smart lock field.

3) Sensitive experience: Consumers have high requirements for the use experience of the home environment, and some inconveniences brought by fingerprint locking (such as the fingerprints of the elderly and children are not easy to unlock). How does face recognition technology work? Overcoming these shortcomings and providing users with a better experience (such as makeup, glasses, different lighting, and different skin tones) is a real need.

4) Cost sensitive: Smart door locks also belong to the field of consumer electronics. The market is huge and there are many competitors. Manufacturers also have high requirements on costs. Fast iterations and downward costs place higher requirements on suppliers at all levels.

3D face recognition advantages

Since Apple introduced FaceID and brought 3D technology from the field of game interaction to the field of mobile phones, consumers' perceptions and experiences of face recognition have become more specific.

It is understood that Apple's FaceID uses a structured light solution, with more than 30,000 transmitting dot matrixes and more than 2 million receiving sensor pixels. It has very few errors (less than 2 mm) for objects scanned within 1 meter. Accurate 3D modeling. The technology adopted by FaceID highly restores the dimensional information of the face. By comparing the 2D and 3D data separately, the authenticity of the face data is double guaranteed.

2 2D cracking methods such as photos and videos, and ordinary mask attacks cannot pose a threat to 3D face recognition. Many people think that high-precision masks are the soft underbelly of 3D face recognition, but Apple's FaceID has also been well tested against such high-precision mask attacks. According to Apple's own official introduction, there are more black technologies behind FaceID, such as tracking human eye movements, observing pupil reflection, analyzing changes in facial micro-expressions, and so on.

The continuous upgrade of technology can better ensure security and protect privacy-these are the goals of other 3D technology manufacturers to learn and catch up.

In addition to the upgrade of technical means to ensure safety, it has to be mentioned that high-precision masks require professional scanning equipment, which scans users for a long time to model and print, which is not operable in practice.

This high-precision mask can be used to test the effect of 3D face recognition, but since it requires user cooperation, it essentially already belongs to the extraction of personal information with the user's knowledge. Imagine: Someone asks you for the door key of your house, tells you to get one, and then opens your door. This is not called cracking. This is called Mingqiang.

Market Summary

According to the author's observations and statistics, currently there are smart lock products that integrate 3D face recognition technology on the market, including binocular stereo vision, TOF flight time, structured light and other technical routes. The representative manufacturers are Deschmann, Advantage, Cloud First-tier brands such as Ding, Kaidis, and fluorite, as well as solution manufacturers such as Zhongkong Zhizhi, Fuge Technology, and Yike Times, Samsung and LG in South Korea have also started to pay attention to 3D face recognition technology. These big manufacturers in the smart lock industry have laid out new products one after another, leading a new round of technological innovation and product upgrading.


Consumers' attention to security is constantly increasing, and the efforts of smart lock manufacturers in terms of security have been improving. In addition to integrating 3D face recognition technology, it has also been matched with voiceprint authentication, random identification code secondary authentication, and smart cat eye tracking. And other supporting technologies, there have even been conceptual products that integrate iris recognition into smart access control.

The continuous expansion of the market scale will bring increasing opportunities and challenges—how to provide a better experience, more secure products, and how to reduce costs have become the problems that 3D manufacturers and smart lock manufacturers need to face and solve together. We are optimistic about the 3D smart lock market in the coming year, and look forward to more powerful manufacturers joining in to make the market bigger and stronger.