An efficient certificateless anonymous signcryption communication scheme for vehicular adhoc network

作者：Changyuan Luo, Duan Li, Muhammad Saad Khan · 发表于：Scientific Reports · 年份：2024 · DOI：10.1038/s41598-024-77992-5 · 被引用次数：8 · 研究领域：Vehicular Ad Hoc Networks (VANETs)、Privacy-Preserving Technologies in Data、Cryptography and Data Security

Certificateless public key infrastructure (PKI) avoids the key escrow problem associated with identity-based PKI and has recently been widely employed in anonymous communication schemes for vehicular adhoc networks (VANETs). In existing certificateless anonymous signcryption schemes for VANETs, vulnerabilities such as potential attacks involving the substitution of pseudonyms and the forging of pseudonymous public-private key pairs exist due to the lack of "identity-key binding" and "non-linearity processing of public-private key pairs." To address this issue, we propose an improved certificateless anonymous signcryption scheme based on elliptic curve cryptography. The scheme incorporates bilinear pairing as one of the authentication mechanisms, designs pseudonym generation algorithms and public-private key pair structures, and introduces a pseudonym verification mechanism. The correctness of the scheme is proven under the random oracle model, and its security is extensively demonstrated through detailed discussions on its confidentiality, authentication, unforgeability, anonymity, and traceability. Furthermore, the time and space complexity of the scheme are calculated. By comparing with recently published certificateless signcryption schemes, it is shown that the proposed scheme offers higher security with smaller computational and communication overheads. This certificateless vehicular network signcryption algorithm provides an efficient encryption solution for anonymous c...