Improvement of Assurance for Wireless Sensor Networks Using Packet Detouring and Dispersed Data Transmission

Wireless sensor networks (WSNs) are an important direction for the Internet of Things. Node capture attacks are one prospective kind of attack on WSNs. To counter this attack, we have previously proposed secure decentralized data transfer. In this proposed method, it was assumed that multiple paths were in place. We also have to consider node failures when we design the data transfer method on WSNs. The data transfer methods have to deal with node failures and have to be dependable. In this paper, we propose a data dispersal method which aims to improve security and dependability features. To improve the dependability of our previously proposed method, we modified our routing method to be able to detour data packets en route when node failure occurs. We conducted simulation experiments using our proposed method in a network simulator. We measured in terms of varying parameters such as the number of shares, the threshold for the secret sharing scheme, the distance between the source and the destination nodes and so on. Additionally, we conducted simulations assuming node failures would occur in the environment. The results show that our method assured security and dependability features better than the single-path based method.