Research And Implementation On The Secure Communication Technology Of Intelligent Home System

With the fast development of the Internet of things and the Mobile Internet, more and more products which combine the two techniques come to our life. Research on the Smart Home system is a hot topic in recent years. Most of the researches are based on systems using Zig Bee network, they focus on enriching the control function of the Smart Home system. While research on the security of smart home is very few. Nowdays cyber security incidents happen all the time which pose a serious threat on personal privacy as well as personal property. Cyber security has become the problem which the Mobile Internet era must face with. The government has even evaluated the cyber security to the level of national security. As privacy is a unique attribute of family life, research on the secure communication of smart home system is of very positive and practical significance.This thesis foucus on applying some secure communication techniques on the Smart Home system. Before comming up with a solution to the secure communication of smart home system, a new hardware platform which use 433 Megahertz as the communication frequency of the wireless home network is built. The platform is designed to solve some problems that the current smart home systems are facing with, such as the hight cost, the complicated protocol as well as lacking security policies. After finished designing all the sub-function modules, this thesis takes a joint test on this platform. The test results show that the system meet all the preset function requirements. When dealing with the secure communication problems of smart home system, this thesis come up with a solution after finding out the security risks of the smart home network. The solution contains two sub-systems, the one time password(OTP) authentication system and the data encryption system. After analyzing the algorithms of the two sub-system, this thesis fuses the two algorithms of the two sub-systems to get a highter level security. The authentication system can verify the legality of the user who want to login the system. Comparing with traditional authentication system, the OTP authentication system can resist four different kinds of cyber attacks, such as the Forgery Server Attack, the Replay Attack, the Password Guessing Attack, the Password Loss Attack. In order to prevent the control command from being eavesdropping and tampering, this thesis designs an encryption system based on AES-128 data encryption algorithm. In order to make up for the deficiencies that the AES-128 algorithm used a static key as the seed key for the data encryption system, this thesis import the 128 bits dynamic key that the OTP authentication system produces into the data encryption system, This can greatly enhance the security of the system.This thesis built a new smart home hardware platform. At the same time, a secure communication solution of smart home is implemented on the platform. The test results show that the thesis has completed the tasks that the research set.