Abstract
The vehicular ad-hoc network (VANET) is a critical component of intelligent transportation, which can improve transportation efficiency and promote road safety. To address security and privacy concerns in VANET, Zhong et al. presented a privacy-preserving authentication scheme. Furthermore, they stated that their scheme was secure and resistant to forgery attacks. However, in this article, we provide three different attack methods to demonstrate that their scheme is vulnerable to Type II attacks, coalition attacks, and universal forgery attacks. Hence, the security of their scheme cannot be guaranteed, and it cannot be deployed in a real-world VANET setting. To fix the security flaws, we give an improved scheme for revising their scheme. Our scheme retains the security properties of the original scheme, but the aggregate signature length is a fixed constant. Compared with related schemes, our enhanced scheme has a higher level of security and communication performance.




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All data generated or analyzed during this study are available from this article and another published article [J. Liu, L. Wang, Y. Yu. Improved security of a pairing-free certificateless aggregate signature in healthcare wireless medical sensor networks. IEEE Internet of Things Journal, 7(6): 5256–5266, 2020].
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Funding
This work was supported by the National Natural Science Foundation of China (No. 61662069) and the Postdoctoral Research Foundation of China (No. 2017M610817).
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Yang, X., Wang, W. & Wang, C. Security analysis and improvement of a privacy-preserving authentication scheme in VANET. Int. J. Inf. Secur. 21, 1361–1371 (2022). https://doi.org/10.1007/s10207-022-00617-3
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DOI: https://doi.org/10.1007/s10207-022-00617-3