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The wireless and resource-constraint nature of a sensor network makes it an ideal medium for attackers to do any kinds of vicious things. In this paper, we describe PLUS, a parameterized and localized trust management scheme for sensor networks security, where each sensor node maintains highly abstracted parameters, rates the trustworthiness of its interested neighbors to adopt appropriate cryptographic methods, identify the malicious nodes, and share the opinion locally. Results of a serious of simulation experiments show that the proposed scheme can maximize security as well as minimize energy consumption for sensor networks. And also, the secure routing proposed based on PLUS shows its benefit and feasibility
Yao et al. (Sun,) studied this question.