中文摘要：

因自组织网络无中心的特点，传统有中心网络中成熟的安全保障机制无法得到直接应用。为了使车载通信技术得到更加广泛的应用，安全问题必须得到很好的解决。文章对车载自组网的安全需求及目标进行分析，然后从安全路由、密钥管理和入侵检测3个方面对车载自组网安全研究的现状进行介绍。在这3个方面中，安全路由研究最为广泛，而密钥管理则是保障车载自组网安全的关键。

英文摘要：

Self-organizing networks have no central node, so the security mechanisms of traditional networks cannot be directly applied in vehicular Ad Hoc networks （VANETs）. So that VANETs can be more widely used, security issues must be properly resolved. This article introduces security needs and objectives of VANETs and discusses current research in secure routing, key management and intrusion detection. While secure routing has been most widely studied, key management is the most critical aspect of VANET security.