Research On Privacy Data Security Problem For Internet Of Things

The Internet of things(Io T) is one of the core national industry. It is widely used in medical, military, traffic and other fields. The key to the development of the Io T is information security, and the privacy information disclosure time harms people’s daily life. Wireless sensor network(WSN) is one of the basic component network of the Io T, and there are a large number of data collection and transmission at the sensor node. Because the computing capability and energy storage are strictly limited at the sensor node, many existing technology of data security protection cannot be applied in the network. How to ensure the legitimacy of information sources and the safety of information transmission has become an urgent issue in the Io T.Security protection scheme is constructed in this thesis combined with digital watermarking, compressed sensing and all kinds of encryption technology. Two aspects of the privacy data security transmission and data origin authentication are researched in this thesis.1. To ensure the accuracy of the information sources in the Io T, a new two-way identity authentication mechanism is proposed, which judge the legitimacy of the node identity by ID information and the initial work status information of the sensor node. Two kinds of simple encryption algorithm of MD5 and AES are combined to use in the sensor node. Then, the automatic warning mechanism and key periodical replacement scheme are proposed in the authentication process.2. Since the Io T secret information is easy to leak in data transfer,a data secure transmission model based on compressed sensing and digital watermarking technology is proposed here. For the sensor node, secret information is hidden and extraction by adding blank character, LSB algorithm and the compressed sensing algorithm. In the base station, the privacy information is obtained by reconstruction algorithm to achieve the secret transmission of signals.Finally, the above scheme is validated by the tool of VS 2010 and MATLAB from simulation experiment. The simulation results show that the new authentication scheme is feasible. It has a great advantage in the functional and safety and can realize the service continuity and troubleshooting timeliness. For the security transmission model of compressed sensing and digital watermarking technology, it is able to accurately reconstruct the original signal and the energy consumption of the sensor node is also reduced significantly.