As the development of science and technology, smart home has achieved significant progress, especially due to the application of wireless communication technology, smart home has made qualitative leaps. Compared with traditional wire communication technology, wireless communication technology is featured with stronger expandability, easier promotion, lower cost, and also avoids the trouble of drill which is necessary for traditional wire technology. As a result, it becomes a trend in the global communication field and enjoys more advantages in the application of smart home system. At present, the major popular wireless communication technology applied in smart home are Bluetooth, Z-WAVE, ZIGBEE, SMART ROOM (ZIGBEE HA standard), etc., and of course, WIFI is also involved in this field.
The full name of WIFI is wireless fidelity, and the formal name of that is IEEE802.11b. WIFI technology is a wireless communication protocol and a short-range wireless communication technology, which can interconnect with personal computer and mobile terminals (PDA, mobile phones) wirelessly. Essentially, WIFI is a wireless network communication technology brand held by WIFI alliance and is mainly used to better the intercommunity among wireless network products based on IEEE802.11 standard.
WIFI has taken a place in the smart home field as well. When one is at home or in the office, one can control home devices by using simple controllers through WIFI technology. For example, one can control lighting system, adjust the shade of lights, open the door and window, and turn on household appliances through smart phones with WIFI function. Actually, most smart home products made by Philips, Sumsung, LG like smart bulbs adopt or support WIFI wireless communication technology. When one opens the smart phone or ipad which are connected with WIFI, one can control the home devices through smart home software easily.
However, the application of WIFI wireless communication technology in the single smart home device (smart bulbs, smart household appliances, smart washing machines) is very easy, but its application in the whole smart home system still exists problems that cannot be ignored. Safety problem is very crucial to smart home. Because WIFI adopts radio-frequency technique, sends and receives data through air, and transmit data signals through wireless radio wave, and therefore, packets can be tested or received by outside world in the process of transmission. Information security is a hidden trouble – although data can be transmitted after encryption, they can also be decoded by hackers in the case of enough packets.
All the home users of WIFI know that decoding WIFI is very easy even without the help of professionals. One can download the crack software from the Internet, and once the wireless network is cracked, it means he can share whatever you have imperceptibly. Although the WIFI technology applied in the smart home is encrypted in a certain way, it is really trivial, compared with ZIGBEE and SMART ROOM (ZIGBEE HA standard) which adopts AES advanced encryption technology that is stronger than encryption methods adopted by Banks.
Before the realization of the interconnection among home devices, the single smart home product is a small smart system. The application of WIFI is small accordingly and even if it is attacked or cracked by hackers, it does not impact other systems. But, once it is used in the whole smart home system, the hazard of cracking can be deadly. According to the feedback of IO Active academy, an America security inspection company, hackers can easily crack the Belkin smart home devices based on WIFI technology, steal the login information in the video camera, know whether the owners at home through a thermostat, and smart TV also become the channel of strangers to peep the owner’s daily life. Therefore, smart home based on WIFI technology cannot ensure users’ security. If even the safe home environment cannot be realized, how can we talk about efficient, comfortable, convenient life?
Home is our safe haven and people value the importance of home security gradually. What’s more, security and protection system has become the most important part in the smart home system gradually. So, with its own advantages, WIFI wireless communication technology has covered globally and been applied widely, and also can be embedded in some smart home products. However, it will not make a difference in the application of the whole smart home system.
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