| Summary: | 碩士 === 淡江大學 === 電機工程學系碩士班 === 95 === Wireless sensor network is composed of a large number of low-cost sensor nodes that are small in size and communicate untethered in short distances. The security issue in distributed sensor networks (DSNs) has been drawing considerable research attention in recent years. With the advance of technology, Public Key Cryptography (PKC) will sooner or later be widely used in wireless sensor networks. This thesis presents a based on One-way Hash Chain distributed voting way node revocation scheme which Base Station will sign the certificates to every node before deployment, and a certificate allows a node to prove that it is authorized to access some service such as data authenticate or node revocation.
Evaluation results show that when we compared with the other node revocation scheme because of what we used is based on PKC distributed voting way node revocation scheme, so calculation cost is comparatively higher. We exploit One-way Hash Function and XOR operation to reduce the energy consumption when casting a revocation vote. After that the energy consumption of new scheme is able to accept by hardware-constrained sensor node. The security analysis of this scheme shows that it has better ability to resistance the active adversaries. Node revocation is a rare happened event, but the security of it considers to be very important in the whole network. Since it is a rare happened event we can suppose that when it happens we can offer more calculation resources. According to previous discussions we can accept the higher calculation cost from our new scheme.
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