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Trust is being deployed along side with cryptography in WSN to achieve better security. This paper describes about how the various systems that are designed to act against attacks with various resource constraints. The design of the security tools for the WSN has to take its vulnerabilities and nature of the technology into consideration thus making them special. In this survey paper, a detailed study about the various methods that apply trust and reputation as their security measure and the attacks that they face are given.
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Kumar et al. (2012) studied this question.
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