Blockchain-Driven Searchable Privacy Preserving Data Sharing for Manufacturing Collaboration
摘要
Manufacturing collaboration is dedicated to interconnecting formerly isolated factories under the drive of projects to enhance production efficiency. However, some data contains privacy concerns, and legal disputes among collaborating factories that are common. In this paper, we propose a searchable and privacy preserving data sharing scheme for manufacturing collaboration. Sensitive data is outsourced to a Cloud Service Provider (CSP), avoiding the need for multiple data encryption after the access control policy is updated. Blockchain replaces the trusted third-party for storing critical proofs due to its decentralized and tamper-resistant characteristics. Smart contracts, natively supported by blockchain, are employed for publicly trusted dispute judgement. The proposed scheme supports predicate hidden Boolean queries, while also reducing the communication overhead. Only the encrypted index fields are stored on the blockchain, ensuring traceability while minimizing storage and computational costs for resource-constrained blockchains. The CSP conducts massive matching over the ciphertext index records, providing integrity proofs. Security analysis affirms the scheme’s resilience against various potential attacks, and simulation results confirm its efficiency.