Group signatures are a leading competing signature technique with a substantial amount of research. With group settings, group signatures provide user anonymity. Any group member with access to the group can generate a signature while remaining anonymous. The group manager, however, has the authority to expose and identify the signer if required. Since the privacy of the sender should be preserved, this is a conflict between privacy and accountability. Concerning high performance on security, we propose a novel, well-balanced security and privacy group signature scheme based on a general linear group over group ring. To the best of our knowledge, our work represents the first comprehensive framework for a group signature scheme that utilizes generic linear groups over group rings. We demonstrate that the competing security goals of message trustworthiness, privacy, and accountability are effectively resolved by our protocol. The results of the performance evaluation and simulation demonstrate that our protocol achieves strong security, system robustness, and high-performance efficiency, making it suitable for practical applications.

KSII Transactions on Internet and Information Systems TIIS Paper Details

In Vehicular Ad Hoc Network (VANET), the dissemination of safety messages facilitates the exchange of safety-critical information among vehicles within a specific proximity, enabling early warnings of potential hazards. The effectiveness of such communication is contingent upon the reliability of transmitted data however ensuring data integrity may compromise vehicular privacy. Moreover, mechanisms must be in place to ensure accountability for misbehavior, particularly in cases involving malicious vehicles. To address these challenges, this article introduces Fractional Order Chaotic Group Ring (FOCGR), a protocol that leverages the chaotic dynamics combined with the algebraic structure of group rings to enhance security in VANET. By employing the unpredictable and sensitive nature of fractional-order chaotic systems, FOCGR provides robust mechanisms for entities registration, message signing, verification, and revocation. The chaotic behavior ensures high resistance to predictability and attack, while the mathematical complexity of group rings fortifies cryptographic operations. The security of the proposed protocol is rigorously evaluated, demonstrate its effectiveness in maintaining the integrity and confidentiality of data dissemination in VANET. Simulation conducted in MATLAB show that FOCGR achieves up to 32% lower communication delay and 27% reduction in computational cost compared to existing schemes, while maintaining strong resistance to common attacks. These results prove the feasibility of FOCGR as a secure and efficient framework for real-world vehicular communication.