TinyAKE：一种实用可信的无线传感器网络认证密钥建立方案
TinyAKE: A More Practicable and Trustable Scheme for Authenticated Key Establishment in WSNs
摘要：
现有的无线传感器网络密钥建立协议没有充分考虑无线传感器网络密钥丢失率高、资源受限、安全性要求高等特点。从MAC层和物理层分析密钥建立问题，现有协议由于协议包过长和单轮密钥建立，实用性不强。为了缓解这些问题的影响，提出了一组安全传感器网络的设计原则，并提出了一种基于轻量级证书的认证密钥传输协议TinyAKE。利用不可否认性理论证明了TinyAKE协议的安全性，同时证明了协议的正确性，并与现有的同类协议进行了性能分析和比较。最后，在TinyOS上用TinyECC实现了TinyAKE。我们的评估表明，TinyAKE是一个更实用和可信的认证密钥建立协议比现有的协议。实验结果表明，在无线传感器网络中采用证书机制进行密钥传输是可行的。仿真结果表明，采用重复密钥协商提高TinyAKE的安全连通率时，最佳的重复协商次数为1。
英文摘要：
The characteristics of high loss rate, resource constraint, being eager for good security haven't been fully considered in the existing key establishment protocols of wireless sensor networks. Analyzing the key establishing problem from the MAC and physical layers, existing protocols are not practicable enough due to their overlong agreement packets and single round key establishment. To mitigate the impact of these problems, a group of design principles for secure sensor networks has been presented and TinyAKE, an authenticated key transport protocol based on lightweight certificate, is proposed in this paper. The security of TinyAKE are proved with the theory of indistinguishability, meanwhile, the correctness is also proved, the performance is analyzed and compared with the existing similar protocols. Finally TinyAKE is implemented in the TinyOS with TinyECC. Our evaluation shows that TinyAKE is a more practicable and trustable authenticated key establishment protocol than existing protocols. The experimental result shows that the key transport with certificate mechanism is feasible in WSNs. Moreover, the simulation results show that the optimal number of repeated negotiation is one when the secure connectivity rate of TinyAKE is improved by using the repeated key negotiation.
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