Scalable and Privacy-Preserving Data Sharing Based on Blockchain  

作　　者：Bao-Kun Zheng Lie-Huang Zhu Meng Shen Feng Gao Chuan Zhang Yan-Dong Li Jing Yang 

机构地区：[1]School of Computer Science and Technology, Beijing Institute of Technology, Beijing 100081, China [2]School of Information Management for Law, China University of Political Science and Law, Beijing 102249, China

出　　处：《Journal of Computer Science & Technology》2018年第3期557-567,共11页计算机科学技术学报（英文版）

摘　　要：With the development of network technology and cloud computing, data sharing is becoming increasingly popular, and many scholars have conducted in-depth research to promote its flourish. As the scale of data sharing expands, its privacy protection has become a hot issue in research. Moreover, in data sharing, the data is usually maintained in multiple parties, which brings new challenges to protect the privacy of these multi-party data. In this paper, we propose a trusted data sharing scheme using blockchain. We use blockchain to prevent the shared data from being tampered, and use the Paillier cryptosystem to realize the confidentiality of the shared data. In the proposed scheme, the shared data can be traded, and the transaction information is protected by using the （p, t）-threshold Paillier cryptosystem. We conduct experiments in cloud storage scenarios and the experimental results demonstrate the efficiency and effectiveness of the proposed scheme.With the development of network technology and cloud computing, data sharing is becoming increasingly popular, and many scholars have conducted in-depth research to promote its flourish. As the scale of data sharing expands, its privacy protection has become a hot issue in research. Moreover, in data sharing, the data is usually maintained in multiple parties, which brings new challenges to protect the privacy of these multi-party data. In this paper, we propose a trusted data sharing scheme using blockchain. We use blockchain to prevent the shared data from being tampered, and use the Paillier cryptosystem to realize the confidentiality of the shared data. In the proposed scheme, the shared data can be traded, and the transaction information is protected by using the （p, t）-threshold Paillier cryptosystem. We conduct experiments in cloud storage scenarios and the experimental results demonstrate the efficiency and effectiveness of the proposed scheme.

关 键 词：data sharing PRIVACY-PRESERVING cloud computing blockchain Paillier cryptosystem 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术] TP316[自动化与计算机技术—计算机科学与技术]