Ad hoc网络特性及身份认证分析

Analysis of Ad hoc network characteristics and identity authentication

移动Ad hoc网络由无线、移动、彼此之间平等的节点所构成。它无需借助通讯网现有固定的基础设备,就完全可以快速应用;而且网络节点在不事先警示或者通知的前提下可以动态、屡次、随意的进入或者退出网络,并且不会影响其余节点之间的通信。所以Ad hoc网络具有网络拓扑动态变化的特点。基于这些特点,Ad hoc网络最主要的缺陷就是安全隐患,而身份认证作为整个Ad hoc网络达到安全稳定的前提,不言而喻在移动Ad hoc网络中至关重要。提出基于椭圆曲线的Ad hoc网络门限身份认证思想,利用椭圆曲线数字签名算法建立子密钥和群密钥,通过子证书的合成并且进行身份验证,使算法具有极强的安全性、高效率,又降低了计算难度,满足自组移动的Ad hoc网络特性。

Mobile Ad hoc network consists of wireless, mobile, equality between nodes. It is not necessary to use existing fixed network infrastructure and was completely can be rapid application. The network node can enter or exit the network dynamically, repeatedly and freely without any prior warning or notice, and can not affect the communication between other nodes. Ad hoc network has the characteristics of dynamic changes of network topology. Based on these characteristics, the important problem of the Ad hoc network is the security issues, especially the identity authentication for mobile Ad hoe network is particularly important, is the premise of the realization of the entire Ad hoc network security mechanism. The algorithm of threshold identity authentication based on elliptic curve is proposed,and the sub- key and group key are established by elliptic curve digital signature algorithm. The sub- certificate is synthesized and authenticated. The algorithm has strong security and high efficiencAnd reduces the computational complexity, and is very suitable for the characteristics of the mobile Ad hoe network with self-organization.