车载自组网中可追踪可撤销的多授权中心属性基加密方案  

Traceable and revocable multi-authority attribute-based encryption scheme for vehicular ad hoc networks

作　　者：吴静雯 殷新春[1,2] 宁建廷 WU Jingwen;YIN Xinchun;NING Jianting(College of Information Engineering,Yangzhou University,Yangzhou Jiangsu 225127,China;Guangling College of Yangzhou University,Yangzhou Jiangsu 225000,China;College of Computer and Cyber Security,Fujian Normal University,Fuzhou Fujian 350117,China)

机构地区：[1]扬州大学信息工程学院,江苏扬州225127 [2]扬州大学广陵学院,江苏扬州225000 [3]福建师范大学计算机与网络空间安全学院,福州350117

出　　处：《计算机应用》2022年第6期1695-1701,共7页journal of Computer Applications

基　　金：国家自然科学基金资助项目(61972094)。

摘　　要：保障消息传输的机密性是对车载自组网(VANET)中通信的基本安全需求。在使用对称群组密钥加密消息的模式下,系统管理者难以追踪内部攻击者,因此,提出了基于属性的车载自组网加密方案。该方案能实现对恶意车辆的追踪和撤销,并能细粒度地划分车辆的访问权限;与此同时,该方案允许多个授权中心彼此独立地分发属性及其对应密钥,防止被妥协的授权中心伪造其他授权中心负责管理的属性密钥,从而保障了多机构间通信协作的高度安全性。该方案在q-DPBDHE2假设下被证明具有不可区分性;而且与同类方案进行加解密开销对比的实验结果表明,当涉及的属性个数为10时,该方案的解密开销为459.541 ms,说明该方案适用于车载自组网中的通信加密。Ensuring the confidentiality of message transmission is a fundamental security requirement for communications in Vehicular Ad hoc NETworks(VANETs).While utilizing symmetric group keys to encrypt messages,it is hard for system manager to trace inner attackers.Therefore,an attribute-based encryption scheme for VANETs was proposed.The scheme enables tracking and revocation of malicious vehicles and fine-grained division of vehicle access rights;meanwhile,the scheme allows multiple authority centers to distribute attributes and their corresponding keys independently,preventing compromised authority centers from forging attribute keys that are managed by other authorities,thus guaranteeing a high security for communication and collaboration among multiple institutions.This scheme was proven indistinguishable under q-DPBDHE2(q-Decisional Parallel Bilinear Diffie-Hellman Exponent)assumption;and experimental results of encryption and decryption overhead comparison of this scheme and similar schemes show that while the number of attributes is 10,the decryption overhead of the proposed scheme is 459.541 ms,indicating that the scheme is suitable for communication encryption in VANETs.

关 键 词：车载自组网 属性基加密 多授权中心 白盒可追踪 用户撤销 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]