Abstract
Abstract: This paper presents a Ciphertext-policy attribute-based encryption (CP-ABE) is widely recognized as a secure access control mechanism for data sharing. However, the generation of secret keys (SK) in most CP-ABE schemes relies on a centralized authority (CA), which can result in high costs for establishing trust and pose a single point of failure. To address these challenges and leverage the characteristics of blockchain technology, several blockchain-based schemes have been proposed to prevent data disclosure and protect user privacy attributes. In this paper, we propose IAM-BDSS, a novel CP-ABE identity-attribute management data sharing scheme based on blockchain, aimed at ensuring privacy through hidden policies and attributes. Additionally, we introduce a transaction structure to ensure the traceability of parameter transmission within the blockchain system. Through experimental results and security analysis, we demonstrate the effectiveness and feasibility of IAMBDSS.
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