Research Of Trust Model Based On Information Entropy Theory For Wireless Sensor Networks

As the development of the information technology, the colorful, the diversifo r m information collecting, sending, transmitting and receiving mode and methods emerge in endlessly, which makes wireless sensor networks(WSNs), as a new means of access to information technology, becomes a focus on current international frontier research spot field, which is studied by plenty of highly cross multidisciplinary. Due to the wireless sensor network uses wireless communication, the communication link is more fragile and easier to be damaged, compared with wired networks, so WSN s need to meet the more stringent information security requirements. This raises a variety of security issues related to the WSNs, and how to realize the communication between the nodes safety has become one of the core problems in wireless sensor network securit y research.Trust between nodes is the basis of wireless sensor network security communication. Based on the study of the existing literature, the author of this paper establishes WSNs trust models by introducing the theory of information entropy and proposes trust propagation algorithm based on immune nodes of WSNs for solving the trust problem of WSNs. In this paper, the main research work and achievements are as follows:(1) This paper studies the information entropy theory, and introduces it into the study of the WSNs trust, thus puts forward a WSNs trust model based on informa t io n entropy. The elements which affect the node trust can be divided into external and internal factors. Sensor nodes can obtain these elements of the corresponding data. Based on the study of the information entropy theory and the establishment of the node trust value elements of the system, this paper introduces the concept of informa t io n entropy, then obtains the direct trust value of nodes and get comprehensive trust value by combining the theory of social networks.(2) This paper studies the infectious disease model, and introduces it into the study of the WSNs trust dissemination, thus puts forward trust propagation algorithm which based on immune nodes of wireless sensor network. In the real life, trust is able to spread continuously in the interpersonal relationship network and trust in wireless sensor networks is in a similar phenomenon. This article puts forward trust propagation algorithm based on immune nodes of wireless sensor network through the study of infectious disease model and adopting the idea of SIR epidemic model.