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Sensor networks presented new opportunities for observing and interacting with the real physical world. They are composed of a large number of sensor nodes and each sensor node has capabilities of sensing, processing, and communication, which underpinned by limited energy. Reducing energy consumption was, is and will be a major concern in sensor networks. For the given extremely limited hardware resources on sensor nodes and the inclement deploying environment, the adversary attack becomes a serious security threat toward wireless sensor networks. In this paper a secure public-key based effective and efficient sensor network is first to be introduced and an algorithm for fast calculation based on 1's complement of binary is also presented.
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