Which wireless communication protocol is best for smart homes? ZigBee is doing what you want. In recent years, in order to compete for the potential of the smart home market, the debate surrounding various wireless protocol standards is constant, but it is undeniable that ZigBee has earned enough attention and is highly regarded and trusted. In the smart home field, compared to Bluetooth, WiFi, Z-Wave, RF and other technical agreements, ZigBee has always been dazzling, with few negative news. It is well-known and well-received, and many people default to the current most suitable smart home agreement. standard.
The reason for this is that it is inseparable from the ZigBee protocol itself, and on the other hand, thanks to the enthusiasm and publicity of some companies.
——Technology, ZigBee is not born for smart home, but long for smart home. Smart home equipment needs to have sufficient security, stability, operational fluency, strong equipment carrying capacity and low power consumption, and ZigBee can meet and meet the requirements, so even ZigBee is mainly used in industry. The field now does not affect its charm in the smart home field.
—— At the promotion level, many well-known companies have adopted them, and some powerful companies have vigorously promoted them. If some people in the village use the ZigBee protocol, you may be scornful, huh, no words, let alone trust, but if Samsung, LG, Texas Instruments, Logitech, Philips, Xiaomi and other well-known companies have adopted it? Will ZigBee feel good? Not only that, but the vigorous promotion of some companies is also very important. For example, the ZigBee Alliance board member and the early adopters of ZigBee's IoT leader IoT Sensing will emphasize ZigBee's advanced encryption algorithm in terms of promotion and promotion, making it safe. Consumers are deeply rooted and have established a good reputation for ZigBee, thus promoting the development of ZigBee in China.
Therefore, no matter from which point of view, the ZigBee protocol has sufficient reasons to be welcomed by smart home manufacturers. However, just after the ZigBee Alliance announced that Samsung's brand SmartThings has become another board member after the IoT sensing, the Black Hat Conference has poured a cold water into the cold water: the smart home using the ZigBee protocol. There is a serious vulnerability in the device.
It is said that security researchers (Cognosec) have found that there are serious vulnerabilities in the devices using the ZigBee protocol. How serious is it? Hackers have the potential to invade smart homes, manipulate networked door locks, alarm systems, and even switch lights. According to past news, this kind of thing should happen to WiFi, Bluetooth or Z-Wave. How did ZigBee get rid of it? Among them are the credits of Cognosec and Xiaobian (original author).
——Black Hat Conference is recognized as the world's highest level information security industry conference and the most technical information security conference. Every year, many professional teams and private experts participate. They can enjoy all the technology products, no need to be merciless, of course, the purpose is to exchange technology and improve the safety of enterprise products. And Cognosec company published a paper on the conference, pointed out a flaw ZigBee protocol implementation methods. The company said the flaw involving multiple types of devices, hackers could harm this ZigBee network, and "take over control of all connected devices in the network."
- If Cognosec company would not be so down, medals as well as the author of the article more than half, in particular, take the subject very wonderful - "Black Hat conference broke the news, there are serious loopholes in the use of smart home devices ZigBee protocol" ( The specific content, please Baidu brain supplement), readers can not see the content does not matter, just look at the title to understand: ZigBee smart home equipment has serious loopholes.
ZigBee protocol smart home equipment has serious loopholes. It seems that the ZigBee protocol is hard to escape, but this idea is a "lazy" idea, which fully proves the victory of the "title party". How can ZigBee, which has always been more reliable, have serious problems? Just look at the title, the key is to look at the content carefully.
Obviously, the title is what will make us quickly think that the ZigBee protocol is problematic, but there is really nothing wrong with the ZigBee protocol. Both the original author and Cognosec actually gave instructions at the end.
"The root causes of vulnerability more manufacturers are pointing easy to use, can work seamlessly with other networked devices in the device, while also drive down cost pressures, rather than the ZigBee protocol standard itself design problems." - This is Author's analysis.
“The shortcomings and limitations we found in ZigBee are caused by manufacturers. Every company wants to make the latest and greatest products, and now it means networking. Simple components such as light bulbs must be combined with other devices. Compatible, not surprisingly, security considerations are rarely considered—more thoughts are on how to reduce costs. Unfortunately, the last level of security risks in wireless communication standards is very high.â€â€” - This is the original Chinese version of the Cognosec researchers.
In fact, it is not difficult to find that the ZigBee, a reliable smart home agreement, has not blacked out the black hat, but has been "smashed out" by some manufacturers who are quick and profitable. So now the problem is coming again. Except for the artificial inaction factor (deliberately ignoring standard security), how likely is the ZigBee protocol to be compromised?
In the general security level of zigbee, there are generally two keys. One is the key of the trust center. The other is the network key when actually transmitting data over the network. In the end, if you want to crack the zigbee network, you must obtain the latter 16-byte strong password network key. Since zigbee is using the AES 128 encryption algorithm. Without knowing the network key, it is impossible to brute force. There is no precedent for cracking.
The speed of brute force is extremely low. Generally only 300key / s, even with the so-called GPU acceleration, the speed is only 10000 key / s, for a complex password cracking time of 8 digit alphanumeric characters need 2900 years! Even with 100 distributed, it takes 29 years!
What's more, zigbee's key is a 16-byte strong password.
The above is an answer from an IoT security expert who has confidence in the security of the ZigBee protocol. Don't ask why this is the case. The content in the original interview email is like this, but it can be said that as long as the previous work is done well, the hacker wants to crack the ZigBee smart home device, it is difficult! As for the "existence using the ZigBee protocol intelligent home devices serious loophole", there is a prerequisite: the manufacturer is not responsible or technology is not in place.
last question. Recently, the national newcomer Ning Zetao won the championship in the 16th World Swimming Championships. The project is a men's 100-meter freestyle, which created Asian miracles and broke through the limits of the yellow race. The influence is considered to be comparable to Liu Xiang's first 110 meters. Hurdles. Obviously, Ning Zetao, a small fresh meat, has the ability to win the 100-meter freestyle, but if he is arranged for the 80-meter track, he will not be able to show his 100 meters.
If ZigBee has 100 security settings, some vendors only use 80 or only 90, and the device is cracked. Is ZigBee protocol security problematic? This answer may be similar to the answer to the last question.
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