计算机科学 ›› 2025, Vol. 52 ›› Issue (12): 331-338.doi: 10.11896/jsjkx.241100093
苏新忠1, 徐友云2
SU Xinzhong1, XU Youyun2
摘要： 随着5G技术的发展,城市交通系统能够以更高效的方式实现信息交互,极大提升了参与者的道路体验。在该系统中,路侧单元通过5G接入访问并转发车载单元、行人终端和道路传感器等节点的数据,可为驾驶员和行人提供有效的态势感知视野,降低事故发生率,提高行车效率。然而,现有认证方案存在安全性低、开销大、可拓展性低等缺陷,为此,提出了一种端到端的车联网轻量级安全认证和密钥更新方案。首先,通过阶乘树实现RSU权限的细粒度访问控制;然后,利用物理不可克隆函数等低开销算法为RSU和车联网设备设计相互认证协议。针对车联网移动性等问题,为参与节点提供动态在线的密钥更新方法,并借助Proverif以及非形式化分析验证其面对各种攻击的安全性。与其他方案在性能开销等方面的对比表明,所提方案适用于资源有限的车联网场景。
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