With the generation of massive traffic information in the smart transportation system, the traffic control center efficiently utilizes broadcast communication to send multiple messages to multiple vehicles. Besides, diversified privacy disclosure and security attack issues also emerged spontaneously. To achieve secure communication between the traffic control center and vehicles in the smart transportation system, we design a broadcast signcryption scheme with equality test in the smart transportation system based on the certificateless cryptosystem and equality test. The scheme realizes message confidentiality and vehicle privacy by using the Lagrange interpolation theorem to encrypt messages and vehicle identities, while also achieving classify ciphertext by using the equality test and facilitate road traffic information management. Through numerical experiment analysis, the proposed work has higher operation efficiency and is more suitable for application in smart transportation systems.

中文翻译：

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智能交通系统中具有平等性检验的广播签密方案


随着智能交通系统中海量交通信息的产生，交通控制中心有效地利用广播通信向多辆车辆发送多条消息。此外，多样化的隐私泄露和安全攻击问题也油然而生。为了实现智能交通系统中交通控制中心与车辆之间的安全通信，基于无证书密码系统和相等性测试，设计了一种智能交通系统中具有相等性测试的广播签密方案。该方案利用拉格朗日插值定理对消息和车辆身份进行加密，实现消息机密性和车辆隐私，同时利用等式检验实现密文分类，方便道路交通信息管理。通过数值实验分析，所提出的工作具有更高的运行效率，更适合在智能交通系统中应用。