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How Does Smart Locks Work

- Oct 25, 2018 -

Driven by the trend of smart homes, more and more families are choosing smart products in exchange for a more convenient life experience. As the first safety guarantee for the family, the door lock is the equipment that every family uses. The smart door lock is also a new trend.


Nowadays, the market is full of various smart door lock products. They look similar, and the unlocking and recognition operations are quite different. Today, we will talk about the security technology principle of smart door locks in a simple way. If you have an intention to change your lock recently, it may take two or three minutes to see which one is right for you!


Easy to understand: the most comprehensive principle of intelligent door lock security technology


Induction lock:Magnetic stripe card, IC card, TM card, RF card

Inductive lock, a type of door lock that is unlocked by a micro-computer chip using an inductive card. It is also called "hotel lock", which is the most commonly used type of smart door lock.


There are two kinds of induction cards required to open such a door lock: one is a contact type magnetic stripe card, and an IC card. Such cards are unlocked by the degree of correspondence between the digital information and the characters. Since these important information are recorded in the magnetic stripe/chip, the card needs to be used with a card reader. To put it simply, the user needs to put the card into the card slot when unlocking, and the card slot is the card reader; and the card reading has a fixed directivity, which is to accurately match the fit of the information. The long-term use of the proximity card will cause the magnetic strip/chip to fall off or be damaged. It needs to be replaced regularly and consumes a lot. It has gradually been eliminated by the market.


The other is a contactless TM card or RF card. The TM card uses single-line protocol communication to complete data reading and writing by instantaneous touch; while the RF card uses radio signal to identify information, both types of proximity cards do not need to be read by a card reader, and are non-contact type proximity cards. When unlocking, the user only needs to close the card to the sensing area on the door lock, which can be easily unlocked. Moreover, this kind of card can control the authority of the card through computer operation, which greatly facilitates the management and security work, and becomes an indispensable safe electronic door lock for hotels, hotels, leisure centers and golf centers.


Today, many villas and families are beginning to accept non-contact inductive door locks. Because the proximity card contains key technologies such as communication signals that are difficult to copy and copy, it is not easy to be cracked and has a high safety factor. In addition, compared to other emerging smart door locks, the price of the induction lock is relatively cheap, the replacement is relatively simple, and the use threshold is low, which is more easily accepted by the public.


But the sensor lock also has a fatal flaw. That is, the card needs to be carried with you. If you lose it, you don't need to contact the manufacturer to change it. However, if it is stolen by someone with a heart, this type of door lock only recognizes the card and does not recognize the person. No matter whoever holds the corresponding proximity card, it can succeed. Reading, the risk is still very large. Therefore, this type of door lock has become one of the entry-level choices in smart door locks.


Password lock: electronic password, virtual password

A password lock is a type of smart door lock that uses a specific digital combination password to control unlocking. The password lock mentioned here is not the mechanical dial lock on the safe. Instead, the finger or the digital password is input on the electronic display to control the circuit or chip operation (access control system), thereby controlling the mechanical switch. Closed electronic code lock. This kind of door lock is easy to operate and does not need to carry anything, as long as the user remembers the password.


Such electronic code locks seem simple, but they use a variety of technical achievements, such as electronic display screens, touch screen sensing technology and data storage technology, which are key technology technologies that have matured in recent years. It can also be said that a small electronic password lock can also show the rapid advancement of technology today.


The electronic password lock has the advantages of fast operation and simple modification of the password, and quickly occupyes a seat in the smart door lock market. As far as the current market for smart door locks is concerned, nearly 80% of them are equipped with electronic code locks, such as Deschman, Cadiz, Dolly, VOC, etc., and they have an extraordinary "obsession" on electronic code locks. Even the product with the main fingerprint lock will not miss the electronic password lock, and regard the password lock as the last guarantee for unlocking.


There is no absolute security in the world, and the electronic password lock is the same. Its biggest vulnerability is that it is very easy to copy, either directly with both eyes or with fingerprints left on the screen. Therefore, the virtual password of the electronic password lock is a crucial function. The dummy password means that the user randomly presses a meaningless number before and after entering the password, and can also unlock the password. For example, the unlock password is 1234, even if the user enters 000123400, the door can be opened smoothly.


Biometric lock:Fingerprint, iris, face, voice, vein

Biometric lock is the most technologically advanced type of door lock in today's smart door locks. It is unique and unchangeable in personal signs, and holds high the banner of “high safety performance”. Nowadays, many manufacturers have introduced various biometric technologies, from the most common fingerprints, irises, faces, to voiceprints and veins, which you can't imagine.


The fingerprint lock is another big market category after the password lock. It can be divided into optical fingerprint head and semiconductor fingerprint head. The optical fingerprint head is read and recognized by the fingerprint image, and the semiconductor fingerprint lock mainly relies on capacitive sensing to recognize the fingerprint. Relatively speaking, the latter is more accurate, faster, safer and more reliable than the former, and can also avoid the problem that the fingerprints of the elderly and children at home are not easily recognized.


The iris and face recognition door locks are still in the research and development stage, and there will be some new products to test the market reaction, but they have not been widely introduced to the mass market. Voice and venous locks are regarded as "smart technology" products. Although they have attracted the attention of the public, very few people are willing to try.


In addition to fingerprint locks already recognized by the market, other biometric door locks are marginalized. There are three reasons: First, in addition to fingerprint recognition, other biometric technologies are still immature. For example, the iris recognition system consists of two major modules: hardware and software, which are the two parts of image acquisition and recognition algorithms, which are indispensable. Second, the cost of equipment is high, the average user can't afford it, and can't be widely promoted. For example, the iPhone X equipped with Face ID can really make people look like they are sighing. Third, the safety performance of biometrics is still in the wait-and-see stage.


Nothing to do, biometric technology in the application of door locks is extremely scientific and imaginative, I hope to see these "magic door locks" landing as soon as possible.


Remote lock:Mobile APP, Bluetooth control, WIFI, access control intercom

The last remote lock mainly uses wireless technology and Internet of Things technology to realize the connection of the door lock and the mobile phone or remote control through wireless signals such as network and Bluetooth. The most common is to unlock the phone through Bluetooth / APP, WIFI, access control intercom system.


Remote control locks are nothing new. Some high-end hotels have taken the lead in integrating mobile phone APP unlocking solutions into the development of smart locks. Just open Bluetooth and directly scan the code into the mobile APP, you can click to unlock, and abandon the traditional sensor card. Smarter, more convenient and more efficient.


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