传感器网络轻量级无证书签名算法及密钥协商机制

Lightweight certificateless signature and key agreement scheme for WSNs

针对传感器网络资源受限的特性,提出了一种轻量级的无证书签名机制,与同类型方案相比,本方案在签名过程中通过避免双线性对的使用,同时采用在线/离线机制使得方案在计算效率上大大提高。在签名方案的基础上,提出了一种为传感网中任意两节点之间的密钥建立的密钥协商机制。最后,该签名方案在随机预言机模型下被证明能够抵抗密钥代替攻击与恶意私钥生成中心攻击,其安全性能够规约于离散对数问题假定。

In this paper, a lightweight certificateless signature scheme is proposed for Wireless Sensor Networks （WSNs） under the condition of limited recourses. The signature scheme is more efficient by using online/offline approach and has no bilinear pairing operation during signing and verifying process compared with the Xirrus Management System （XMS） and Paterson scheme. Based on this signature scheme, a key agreement scheme is also proposed, which can be used by every two nodes in WSN to establish a session key safely. Finally, this signature scheme is proved to be securing that can defense the two attacks proposed in A1-Riyami and Paterson security model, and the security proof can be reduce to discrete logarithm problem.