Blockchain Enabled Secure and Efficient Reputation Management for Vehicular Energy Network.

Blockchain (BC) based Vehicular Energy Network (VEN) enables secure and distributed trading between the vehicles. Furthermore, reputation management is a critical requirement for building trust in BC based VENs. However, the existing BC based reputation schemes are vulnerable to replay attacks due to insecure reputation verification. Moreover, a BC based VEN also requires a privacy preserving traceability mechanism to prevent false information dissemination and fraudulent transactions. Furthermore, a VEN also necessitates an efficient storage mechanism to reduce the storage overhead incurred by the BC ledger. To address these issues, this paper presents a BC based secure and efficient reputation management scheme for VENs. The proposed scheme provides a secure vehicles’ reputation verification mechanism to prevent the replay attacks. Moreover, the proposed scheme uses Elliptic Curve Digital Signature Algorithm based pseudonym mechanism to enable conditional anonymity and vehicles’ traceability. Furthermore, the proposed scheme uses InterPlanetary File System to efficiently store the vehicles’ reputation information and consequently, reduces the storage overhead. Finally, performance and security analysis is performed to show the effectiveness and practicality of the proposed scheme.