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Privacy Protection Model for Blockchain Data Sharing Based on zk-SNARK

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Data Science (ICPCSEE 2021)

Part of the book series: Communications in Computer and Information Science ((CCIS,volume 1452))

Abstract

In the era of big data, data sharing and communication play a crucial role. The blockchain data sharing model based on ciphertext policy attributed-based encryption (CP-ABE) is an existing solution to data sharing. However, it puts the access policy and attributes directly on the blockchain, so every one in the blockchain can access these access policies and attributes, which will cause privacy leakage. To solve this problem, a privacy protection model based on zk-SNARK is proposed in this paper. The blockchain double-chain structure was applied in this model, and the fine-grained access control of data sharing was realized based on CP-ABE scheme. At the same time, zk-SNARK technologies were adopted to protect sensitive access policies and sensitive attributes from disclosure, effectively defending the privacy of users when data sharing in blockchain.

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Acknowledgment

This work is supported by the National Key Research and Development Program of China (No. 2017YFB1400700).

Author information

Authors and Affiliations

  1. School of Information, Central University of Finance and Economics, Beijing, 100081, China

    Yang Li, Guangzong Zhang, Jianming Zhu & Xiuli Wang

  2. Engineering Research Center of State Financial Security, Ministry of Education, Central University of Finance and Economics, Beijing, 102206, China

    Yang Li, Jianming Zhu & Xiuli Wang

Authors
  1. Yang Li
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  2. Guangzong Zhang
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  3. Jianming Zhu
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  4. Xiuli Wang
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Editor information

Editors and Affiliations

  1. North University of China, Taiyuan, China

    Jianchao Zeng

  2. North University of China, Taiyuan, China

    Pinle Qin

  3. Northeast Forestry University, Harbin, China

    Weipeng Jing

  4. Harbin University of Science and Technology, Harbin, China

    Xianhua Song

  5. National Academy of Guo Ding Institute of Data Science, Beijing, China

    Zeguang Lu

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Li, Y., Zhang, G., Zhu, J., Wang, X. (2021). Privacy Protection Model for Blockchain Data Sharing Based on zk-SNARK. In: Zeng, J., Qin, P., Jing, W., Song, X., Lu, Z. (eds) Data Science. ICPCSEE 2021. Communications in Computer and Information Science, vol 1452. Springer, Singapore. https://doi.org/10.1007/978-981-16-5943-0_19

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  • DOI: https://doi.org/10.1007/978-981-16-5943-0_19

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-16-5942-3

  • Online ISBN: 978-981-16-5943-0

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