BGAS: blockchain-based secure and efficient group key agreement scheme for dynamic vehicular platoon

BGAS: blockchain-based secure and efficient group key agreement scheme for dynamic vehicular platoon

연구 분야: Cryptography

학회: Cluster Computing

The security of dynamic platoon communication mainly relies on sharing a cryptographic group key confidentially. Existing vehicular platoon group key agreement schemes have encountered many problems, such as neglecting vehicle privacy protection and relying heavily on trusted third parties (TTP), resulting in a Single Point of Failure (SPoF), modification attack, linkability, and replay attack. Furthermore, most of these schemes suffer from high computation and communication burdens for generating and distributing group keys, rendering them incapable of supporting secure communication within dynamic platoon scenarios. Thus, this paper proposes a TTP-free blockchain-based group key agreement scheme that constructs a smart contract with the region and formulates a transparent data access strategy for vehicles, thereby eliminating the dependence on TTP. Meanwhile, the BGAS integrates anonymous authentication, 5G, Elliptic Curve Cryptography (ECC), and secret sharing technology to ensure vehicle privacy and secure platoon communication, enabling fast and efficient group key agreement during the dynamic adjustment of platoons. Finally, the security analysis and simulation experiment results show that compared with related solutions, the BGAS reduces security threats and computation and communication overhead.