广播认证是传感器网络中很重要的安全服务,它允许发送者通过安全的方式广播信息给多个节点.无线传感器网络中的μTESLA、M-μTESLA等基于消息认证码的广播认证协议存在一些不足,加上最近的研究显示,基于双线性对的加密算法可应用于资源有限的传感器节点.本文介绍一种高效的基于身份的无证书短签名协议,它拥有目前最短的签名长度160bits,计算量相比其他公钥签名低得多,还能提供认证多个基站的广播信息的功能.基于MICA2DOT平台对其通信和计算能量消耗进行分析,以及对该协议的其他性能的分析,得出该协议引入的能量消耗小,满足广播认证的一些重要性质,适合无线传感器网络环境.%Broadcast authentication is a critical security service in sensor networks, since it allows a sender to broadcast messages to multiple nodes in a secure way. In wireless sensor networks, the broadcast authentication schemes based on message authentication code, like μTESLA and M-μTESLA, have some disadvantages. Recent research results have shown that bilinear pairing based cryptography is applicable on resource-constrained sensor nodes. This paper introduces an efficient identity-based certifi-cateless short signature scheme. The size of signature generated by this scheme is approximately 160-bit long, which is the shortest signature so far. And the computation cost is much less than that of other public key signatures. It also provides the feature that it can authenticate the broadcast messages from multi-base-stations. Based on the MICA2D0T platform, the energy consumptions on communications and computation are analyzed. And the protocol's other performances are also analyzed. The protocol proposed in this paper can effectively reduce resource cost and satisfy some cardinal properties of broadcast authentication, so it adapts the characteristics of wireless sensor networks.
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