Secure Routing Based on Network Coding in Wireless Sensor Networks

As the Wireless Sensor Network(WSN) has features such as rapid deployment and self-organizing, it´s broadly applied in many fields such as ecological monitoring, military reconnaissance and so on. Network coding is a potential technology to decrease the communication traffic of wireless sensor network. However, it also suffers from the security threats such as eavesdropping or tampering. In this paper, we consider the secure routings based on network coding in two scenes. In first scene, only the source nodes and sink node can code the packets. We proposes a Secure Routing based on Pre-shared Secret(SR-PS). The routing algorithm makes sink node shares a one-way hash table with all nodes in the wireless sensor network firstly. Then, it transmits the data by multipath based on network coding. According to the majority rules, we believe the routings satisfy the r-secure which means SP-RS can work normally if the polluted paths are less than r. At the same time, it encrypts the random coding parameters with shared secret key which plays important role in supervision and protection of data security. In second scene, the relay nodes can code the packets but the data is transmitted by single-path. We design a Secure Routing based on the Random Coding(SR-RC) which improves the success decoding ratio of sink node and the success transmission ratio by two sets of random number. From the analysis of simulation results, we can find our schemes can resist special attacks with light overhead in different scenes.