Group Communication in Wireless Sensor Networks Using Matrix Decomposition

Wireless sensor networks (WSN) have attracted significant interests from the research community in a wide range of applications such as target tracking, environment monitoring, military sensing, distributed measurement of seismic activity, and soon. To achieve secure communication between sensor nodes in wireless sensor networks (WSNs), A matrix-based key pre- distribution scheme for WSN is presented, as shown in the following process. First, matrix- based method is employed to decompose the polynomial pool, which substitutes for the key pool to establish the shared keys. Second, the shared key is computed by the shared polynomial. Third, it can always compute the common polynomial with mutual authentication. The analysis in this paper indicates that the existing schemes require a large number of keys in each sensor node to display a comparable connectivity as the proposed scheme which allows almost 100% connectivity regardless of the number of keys, and it develops an efficient encoding mechanism to optimize the network-wide storage usage. On the other hand, compared with existing schemes, our scheme has better performance in network resilience.