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在需要进行安全通信的无线传感器网络应用中,复杂的公钥系统难以在资源有限的传感节点上实现,而基于随机预分配的对称密钥系统有节点连通性不强、密钥存储空间过大、密钥协商过程复杂且不灵活等问题。因此,在异构无线传感器网络基础上,提出一种联合公钥机制与私钥机制的混合密钥管理方案(DHKAS)。该方案使用一种简便可靠的方法,以较小的代价解决了密钥管理中最关键的节点认证问题。分析结果显示,所提方案有效提高了节点的连通性、减少了密钥存储空间,并增强了网络抗攻击能力。
In WSNs that need secure communication, complex public-key systems are difficult to implement on sensor nodes with limited resources. However, symmetric-key systems based on random pre-allocation have poor connectivity and key storage space Large, key agreement process is complex and not flexible and so on. Therefore, based on heterogeneous wireless sensor networks, a hybrid key management scheme (DHKAS) is proposed, which combines public key mechanism and private key mechanism. The solution uses a simple and reliable method to solve the key node authentication problem in key management at a small cost. The analysis results show that the proposed scheme can effectively improve the connectivity of nodes, reduce the key storage space and enhance the network anti-attack capability.