一种有效的无线传感器网络密钥协商方案

An Efficient Key Agreement Scheme for Wireless Sensor Networks

针对无线传感器网络能量、计算能力、存储空间以及带宽等局限性问题,提出了一种适合无线传感器网络的密钥协商方案EKASFWSN(Efficient Key Agreement Scheme for Wireless Sensor Networks).该方案首先运用身份加密(IBE)算法预置网络系统参数并通过计算获得节点的相关参数;然后节点使用组播技术向邻居节点广播其ID号并利用Diffie-Hellman密钥交换技术和IBE算法安全地交换节点间的相关参数、计算节点的密钥;最后利用计算获得的节点间共享密钥使用对称密码方法对网络消息进行加、解密.与目前在WSNS研究中比较流行的传统网络密钥协商方案进行的理论分析和仿真实验,结果表明:EKASFWSN方案较好的解决了无线传感器网络在计算能力、能量、存储空间和带宽等方面的局限性问题;并通过密钥交换和身份加密等技术提高了节点通信的安全.

Considering limitation of power, computation and storage resources of wireless sensor networks. The paper proposes an efficient key agreement scheme for wireless sensor networks. Firstly, the proposed scheme pre-distributes network system parameters using identity based encryption algorithm and computes nodes＇ parameters. Then it broadcasts node＇s identity to networks and exchange parameters between nodes and computes nodes＇ key using Diffie-Hellman key exchange technology and identity based encryption algorithm. Final of the proposed scheme is the message encryption and decryption operations based on symmetric cryptography,for example IDES.In the proposed scheme,key exchange technique and identity based encryption algorithm make it safer, Analyses show that the proposed scheme needs less resource than other schemes need when we apply it to wireless sensor networks. Compared with traditional public key scheme and symmetric key scheme through comprehensive simulation, the simulation results show that our key agreement scheme is efficient for wireless sensor networks.