A Blockchain-Enabled Decentralized Framework for Secure Data Sharing in Information Service Systems

Abstract

With the rapid expansion of digital information services, massive volumes of data are continuously generated from diverse sources and exchanged across multiple platforms. Such complex data environments introduce significant challenges in secure sharing, access authorization, trust management, and circulation supervision. Traditional centralized distribution architectures are increasingly inadequate in addressing these issues, particularly in large-scale and highly distributed networks. To overcome these limitations, this study presents a decentralized information service data sharing framework that integrates blockchain technology, distributed storage, and cryptographic access control. In the proposed approach, original service data are first encrypted and uploaded to the InterPlanetary File System (IPFS), ensuring scalable and resilient storage. Corresponding data indexes and metadata are then maintained by information service nodes. To support flexible and fine-grained data distribution, a proxy re-encryption–based authorization mechanism is incorporated into the subscription and delivery process, enabling secure key transformation without exposing plaintext content. Furthermore, a consortium blockchain is deployed to establish a trusted distribution network, where access records, key management information, and transaction logs are immutably preserved. By combining decentralized storage, blockchain-based auditing, and cryptographic delegation, the proposed framework enables transparent, reliable, and efficient data circulation among information service participants. Experimental analysis and system evaluation demonstrate that the scheme effectively enhances data security, access controllability, and service reliability in cross-platform information environments.