Ensf: Energy-efficient Next-hop Selection Method Using Fuzzy Logic in Probabilistic Voting-based Filtering Scheme

Wireless sensor networks (WSNs) are regularly deployed in harsh and unattended environments, and sensor nodes are easily exposed to attacks due to the random arrangement of the sensor field. An attacker can inject fabricated reports from a compromised node with false votes and false vote-based reports. The false report attacks can waste the energy of the intermediate nodes, shortening the network lifetime. Furthermore, false votes cause the filtering out of legitimate reports. A probabilistic voting-based filtering scheme (PVFS) was proposed as a countermeasure against this type of attacks by Li and Wu. PVFS uses a vote threshold, a security threshold, and a verification node. The scheme does not make additional use energy or communications resources because the verification node and threshold values are fixed. There needs to be a verification node selection method that considers the energy resources of the node. In this paper, we propose a verification path election scheme based on a fuzzy logic system. In the proposed scheme, one node transmits reports in the node with a strong state through a fuzzy logic system after which a neighbor is selected out of two from the surroundings. Experimental results show that the proposed scheme improves energy savings up to maximum 13% relative to the PVFS.