Version 1
: Received: 7 October 2023 / Approved: 9 October 2023 / Online: 10 October 2023 (12:20:13 CEST)
How to cite:
Kabil, A.M.; Aslan, H.; Azer, M. Cryptanalysis of two Conditional Privacy Preserving Authentication schemes for VANETs. Preprints2023, 2023100641. https://doi.org/10.20944/preprints202310.0641.v1
Kabil, A.M.; Aslan, H.; Azer, M. Cryptanalysis of two Conditional Privacy Preserving Authentication schemes for VANETs. Preprints 2023, 2023100641. https://doi.org/10.20944/preprints202310.0641.v1
Kabil, A.M.; Aslan, H.; Azer, M. Cryptanalysis of two Conditional Privacy Preserving Authentication schemes for VANETs. Preprints2023, 2023100641. https://doi.org/10.20944/preprints202310.0641.v1
APA Style
Kabil, A.M., Aslan, H., & Azer, M. (2023). Cryptanalysis of two Conditional Privacy Preserving Authentication schemes for VANETs. Preprints. https://doi.org/10.20944/preprints202310.0641.v1
Chicago/Turabian Style
Kabil, A.M., Heba Aslan and Marianne Azer. 2023 "Cryptanalysis of two Conditional Privacy Preserving Authentication schemes for VANETs" Preprints. https://doi.org/10.20944/preprints202310.0641.v1
Abstract
Conditional Privacy Preserving Authentication (CPPA) schemes are an effective way of securing communications in Vehicular Adhoc Networks (VANETs), as well as ensuring user privacy and accountability. Cryptanalysis plays a crucial role in pointing out the vulnerabilities in existing schemes to enable the development of more resilient ones. In 2019, Zhang proposed a CPPA scheme for VANET security (PA-CRT), based on identity batch verification (IBV) and Chinese remainder theorem (CRT). In 2023, this scheme was crypt-analyzed by Tao. In this paper we provide our own crypt analysis of Zhang’s scheme and propose counter measures to mitigate Tao’s attacks. Furthermore, in 2021, Xiong proposed a Certificateless Aggregate Signature (CLAS) scheme which was cryptanalyzed by Shim in 2023. Xiong subsequently proposed a modified CLAS scheme which is also cryptanalyzed in this paper.
Computer Science and Mathematics, Security Systems
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
