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Advanced Lightweight, Dependable and secure Trust System for Clustered wireless sensor networks

□ The major challenge faced by wireless sensor networks are security and communication delay. To solve this issue, a trust model is required to identify malevolent, selfish and compromised nodes. The existing trust systems developed for WSNs are incapable of satisfying these requirements because of their high overhead and low dependability. This paper does a brief review of the various trust models. Wide varieties of trust models are currently available to improve security and efficiency of wireless sensor networks. Among them, Lightweight Dependable Trust System for Clustered wireless sensor network (LDTS) is a suitable one. The LDTS proposes a lightweight trust decision making scheme predicated on nodes in the clustered WSNs. To reduce calculation overheads and improve energy efficiency LDTS is enhanced by integrating a unique protocol defined for data exchange and whenever a node transmits a packet, the packet is validated against this protocol.