自认证公钥的无线传感器网络密钥协商协议

自认证公钥密码不需要证书管理,不存在密钥托管问题,非常适用于资源受限的无线传感器网络.但现有的自认证公钥传感网密钥协商协议存在安全性低和能量消耗大的缺点.首先分析并指出Yoon等人提出的协议不能抵抗密钥泄漏伪装攻击;然后采用MTI协议族的“隐式认证”的思想,基于椭圆曲线Diffie-Hellman假设,设计了一个新的基于自认证公钥体制的认证密钥协商协议WSN-AKA.该协议是第1个可证明安全的传感器网络自认证公钥体制密钥协商协议.与现有协议相比,该协议不仅安全性更高,而且因其密钥协商只需两次消息传递,其通信效率也最高而能耗最少.

Key Agreement Protocol for Wireless Sensor Networks Using Self-Certified Public Key System

Wireless sensor networks use small nodes with constrained capabilities to sense,collect,and disseminate information in many types of applications.As sensor networks become wide-spread,security issues become a central concern.The design of key agreement protocols,whose main objective is to provide secure and reliable communication,is one of the most important aspects and basic research field of secure wireless sensor networks.Self-certified public key system,which does not require certification management and has no key escrow problem,is ideal for resource-constrained wireless sensor networks.However,the existing sensor network with key agreement protocols based on self-certified public cryptography is low security and great energy consumption.First of all,after the protocol proposed by Yoon et al is analyzed,it is pointed out that the protocol can not resist the key compromise impersonation attack.Then the idea of the implicit authentication in the MTI protocol families is adopted to devise a new authenticated key agreement protocol for wireless sensor networks using self-certified public key.To our knowledge,the proposed scheme is the first provably secure key agreement protocol for wireless sensor networks based on self-certified public key system.The scheme not only provides greater security,but is the most efficient communication and requires less energy compared with the existing relevant protocols,because of only two-pass message exchanges.