Blockchain Data Transaction with Leakage Tracing Based on Digital Fingerprint

Data transaction promotes data circulation and mitigates the issues of Data Island. However, unlike traditional physical goods, data can be easily copied. This feature always induces leakage after selling the right of use in the transaction, resulting in the loss of users’ interest. In fact, it is difficult to restrain when buyers make backups and leak after purchasing the complete data. Therefore, it’s necessary to design corresponding schemes to ensure the data security in the transaction process, find the data after the buyer leaked and identify the malicious leaker. In this paper, we propose a data transaction architecture with leakage tracing by blockchain and digital fingerprint. In our architecture, buyers interact with sellers who pass the screening through the smart contracts. The digital fingerprint is utilized to avoid the malicious behavior of sellers and track leaked data by buyers. Then we provide an improvement plan to optimize the scheme of leakage tracing in data transactions by combining reporting and deposit mechanisms. In addition, we develop a Decentralized Application (DApp) to build the model for data transaction and leakage tracing. Experiments on the DApp demonstrate the effectiveness and feasibility of our proposed architecture.