基于Hash函数的WSN密钥分配方案

针对经典随机密钥预分配方案存储和通信开销大、安全性不足的问题，提出一种基于Hash函数的无线传感器网络密钥预分配方案。采用Hash函数单向运算提高密钥安全性，通过单次广播过程分配密钥法降低通信开销。仿真结果表明，该方案可降低存储开销，提高节点抗俘获攻击能力，且通信开销从O(2N)降至O(N)。

Key Distribution Scheme for WSN Based on Hash Function

Aiming at the problems of large memory and communication cost, low security in typical key pre-distribution protocol, this paper presents a key pre-distribution scheme for Wireless Sensor Network(WSN) based on Hash function. It improves key security by advantage of one-way Hash function, and establishes key method by once broadcasting process to reduce the communication cost. Simulation results show that this scheme can reduce memory cost and decrease the communication cost from O(2N) to O(N), and improve resilience of node capture.