一种基于身份的车载自组网认证机制

针对车载自组网（VANET）的安全特性，采用基于身份的密码学算法、分布式秘密共享算法和XTR公钥密码体制，实现安全高效的车辆节点认证。在使用Lagrange插值公式实现分布式的系统主密钥的基础上，基于XTR体制中的迹运算实现安全的分布式节点密钥签发；简单讨论了XTR密码体制下基于身份的数字签名算法；同时，引入信誉值的概念来查找和剔除网络中的恶意节点。通过算法安全性和效率分析，该机制适用于分布式的车辆移动网络环境。

Identity-based authentication scheme for VANET

In order to realize secure mobile node authentication in vehicle Ad hoc networks(VANET),this paper proposed a scheme consisting of identity-based cryptographic algorithms,secret sharing distributed algorithms and XTR public key cryptosystem to achieve safe and efficient traffic nodes certification.This algorithrn used Lagrange interpolating polynomial to distribute master secret key among system nodes,and presented a distributed procedure to securely issue node key based on the XTR system tracks algorithm.This paper discussed identity-based digital signature algorithm on the XTR cryptosystem briefly.And used the concept of the credibility of the value to find and eliminate malicious nodes in the networks.After analyzing the security and efficiency of the proposed algorithm, the mechanism would apply to vehicles distributed mobile network environments.