How to choose a smart door lock?

How to choose a smart door lock?

When talking about smart locks, we have to start with the security level of the lock cylinder. In fact, many people have equated the security level of the lock cylinder with the security level of the lock. So, in the first chapter, let’s talk about the safety level of the lock cylinder.
According to the currently widely circulated security level classification, the lock cylinder is divided into three levels of A/B/C according to the difficulty of being cracked, and the security capability is C>B>A. But in fact, from the perspective of the Ministry of Public Security’s classification of lock cylinder safety levels, there are actually only two levels, A-level and B-level. The so-called C-level is more of a “custom” security level circulated among merchants. It is said that the C-level lock cylinder cannot be cracked within 270 minutes through technical means.

As for smart locks, basically the cylinders use C-level cylinders. So far, I have only seen a brand that promotes my B+-level cylinders (not to mention the specific brand, avoid suspicion). According to my experience, they have indeed reached at least a B+ level. When I was testing a certain brand of smart locks, I really found a certified unlocking master and asked him to try to open the smart door lock with a physical lock cylinder through technical unlocking methods.

Of course, the final result was that the master gave up after 2 hours. According to some unlocking masters, it is said that the smart door lock is to be opened. And in the end it is often brute force. Therefore, at least from a theoretical level, smart locks are very safe, even beyond traditional door locks.
True and false ferrules, this is a question that people who have already done some research on smart locks will be concerned about. But in fact, it is precisely because of this understanding that it is easy to become entangled with some information. The reason for the entanglement is that false ferrules are subjectively considered unsafe. The so-called true mortise means that the lock core penetrates the lock body, similar to the structure of the lock body of a traditional door lock, while the false mortise means that the lock core and the lock body are separated, and the lock core pushes the lock body to unlock the bolt through the linkage rod. The lock cylinder is located inside the front panel and is separated from the lock body. This is also a common design idea for products that currently adopt false ferrule solutions.
So the question is-is the fake ferrule safe? My point is that, theoretically or structurally speaking, fake ferrules are indeed inferior to real ferrules. Because if the smart lock is broken, the outer shell is removed, and the lock body with the real mortise still has the security capability of the C-class traditional lock. But if it is a fake ferrule, if the front panel is removed, the lock body will not be locked at all, and it can be opened with a screwdriver.
But wait a minute! ! ! Take a closer look at the premise of the above paragraph. The premise is that the front panel is torn down. In fact? Theoretically, the front panel can be disassembled by violence, but for ordinary thieves, how can it be possible to bring professional demolition tools? Ordinary demolition tools are simply impossible. The picture below is a picture taken in the evaluation of a product I have done before. The front panel of this lock is glass, but the entire lock body is a metal frame. I broke the glass panel with a hammer, but still couldn’t remove the shell. And this process is very dynamic.

Of course, the electronic function of this lock has failed due to my destruction, but the lock body is still not unlocked, and it can be opened normally with the physical key. Moreover, the outer panel of the smart lock generally has a sensing mechanism, and if it detects a break, it will sound an alarm or send an alarm. Ordinary thieves are still unlikely to use such extreme methods to break smart locks. Therefore, under the premise that the front panel cannot be removed, the safety level of the true and false ferrules is actually not much worse.

Door locks are the first step to prevent thieves from entering the room. A good door lock makes security more intelligent and makes life safer and more convenient. So when choosing, you must not be sloppy. 1. First of all, in terms of appearance and quality. For the convenience of friends, let’s not talk about the internal structure of the lock for the time being, because it involves family security, so what you can see from the exterior must give people a sense of security. 2. Choose the right door lock according to your needs. The current smart door locks generally have fingerprints, passwords, keys, swipe cards and other ways to open the door. There are also face recognition technology, but the cost is high, and the general is not safe. , Not recommended. Swiping the card to open the door is not recommended, because the level of copying the card is very high and it is not safe. 3. It should be purchased in combination with the environment, conditions and requirements of use. To determine the functional requirements according to the application, because different use environments have different functional focuses. Such as dry humidity, door structure, thickness, left or right door, inside or outside door (general locks can be adjusted to open the handle left and right, inside and outside. Also pay attention to the length of the accessories when choosing the thickness of the door Enough). 4. There are not more ways to lock and open the door, the better, just choose what you need, more is a waste and unsafe, for example, choosing a password and fingerprint is relatively better, these two methods are both safe and All belong to the real “without key”, which is also good in terms of convenience.

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