Abstract
Vehicular sensor networks have been widely applied in intelligent traffic systems in recent years. Because of the specificity of vehicular sensor networks, they require an enhanced, secure and efficient authentication scheme. Existing authentication protocols are vulnerable to some problems, such as a high computational overhead with certificate distribution and revocation, strong reliance on tamper-proof devices, limited scalability when building many secure channels, and an inability to detect hardware tampering attacks. In this paper, an improved authentication scheme using certificateless public key cryptography is proposed to address these problems. A security analysis of our scheme shows that our protocol provides an enhanced secure anonymous authentication, which is resilient against major security threats. Furthermore, the proposed scheme reduces the incidence of node compromise and replication attacks. The scheme also provides a malicious-node detection and warning mechanism, which can quickly identify compromised static nodes and immediately alert the administrative department. With performance evaluations, the scheme can obtain better trade-offs between security and efficiency than the well-known available schemes.
Highlights
According to a report by the World Health Organization (WHO), the total number of worldwide road traffic deaths caused by various traffic accidents is 1.25 million per year [1]
As part of an intelligent transportation system (ITS), vehicle sensor networks (VSNs) provide a better resolution to traffic problems via the collection, processing and dissemination of traffic information within the scope of interconnected sensor nodes, which are mounted on vehicles and roadsides
This paper presents an enhanced identity-based (ID-based) certificateless authentication scheme to solve the aforementioned problems
Summary
According to a report by the World Health Organization (WHO), the total number of worldwide road traffic deaths caused by various traffic accidents is 1.25 million per year [1]. Various wireless communication devices on vehicles broadcast traffic information to RSUs or other vehicles every 100–300 milliseconds according to the DSRC. It must take a short amount of time to deal with a message without delay for VSN entities. The information among VSN entities include traffic conditions (e.g., road defects, congestion situations and temperature conditions, etc.) and vehicle conditions (e.g., location, speed, traffic status, etc.) [2] These messages are indispensable for vehicles and infrastructure, such as traffic control centers, which use these messages to make critical decisions in an emergency situation.
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