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Wireless sensor networks (WSNs) are a distributed collection of sensor nodes which are distributed geographically in the deployed environment to sense the natural phenomena. The sensed data are transmitted by the nodes using multi-hop communication until it reaches to the base station. Due to its resource-constraint nature of device and its communication in open and unfriendly environment, providing energy optimization along with the secured communication is a major challenge. In this work, a trust-aware neuro-fuzzy-based clustering along with sparrow search optimization algorithm (NF-SSOA) is proposed to provide energy-efficient trust-aware cluster-based secured data transmission in WSNs. The proposed protocol performs effective clustering of the nodes by employing neuro-fuzzy clustering algorithm, and routing is performed by sparrow search optimization algorithm. ECC-based digital signature …