一种基于能量合作的异构传感网密钥管理机制

Research on Key Management Mechanism of Heterogeneous Sensor Network Based on Energy Cooperation

针对无线传感器网络密钥管理节点能量受限和能量不均衡问题,提出了一种基于能量合作的异构传感网密钥管理机制。该机制让性能更强的节点担任簇头节点,采用能量收集技术为节点补充能量,采用能量合作技术平衡节点能量。各传感器节点只需与它们的通信邻居建立连接,节点间采用能量均衡路由进行数据传输。节点通过密钥协商建立共享密钥,对传输的数据加密,使用椭圆曲线加密算法对传输的密钥加密。性能分析表明,该机制减少了密钥管理的存储开销,延长了网络生命期,提高了网络的安全性。

Aiming at the problems of energy limitation and energy imbalance in the key management of wireless sensor network,a key management mechanism for heterogeneous sensor networks based on energy cooperation is proposed.The mechanism selects the more powerful nodes to act as cluster heads and uses energy harvesting technology to supplement the nodes with energy.The energy of nodes is balanced by the energy cooperation technology.Each sensor node only needs to establish the connection with their communication neighbors.The nodes use energy-balanced routing to transmit data and set up shared keys by means of key exchange to encrypt the transmitted data.The transmitted key is encrypted by elliptic curve cryptography.Performance analyses show that this mechanism reduces the storage overhead of key management,extends the network lifetime and improves the security of the network.