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A Privacy-Preserving and Auditable Scheme for Interfacing Public Blockchain with Consortium Blockchain

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Blockchain Technology and Emerging Technologies (BlockTEA 2022)

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Abstract

With the development of blockchain technology, consortium blockchain is being applied in various scenarios. However, data and related assets are restricted to the closed consortium blockchain environment, and the end-users who do not belong to the consortium are difficult to gain access without extra authentication. Thus, architectures concerning cross-chain interaction appear, while most solutions have only limited functionalities. Moreover, few solutions have considered privacy from multiple perspectives, including the privacy of end-users, consortium members, or the data itself. This paper proposes a privacy-preserving and auditable architecture scheme for interfacing consortium blockchain members with end-users of the public blockchain. Our scheme enables end-users to communicate with the inner consortium in a verifiable, privacy-preserving, and auditable manner. More specifically, we improve the existing cross-chain network architectures to further protect the consortium members’ privacy. Also, the communication and the transactions of the cross-chain interaction are protected and auditable. Concrete protocols are proposed, and security models and corresponding analyses are investigated.

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Acknowledgement

This work has been partly supported by the Fundamentral Research Funds for the Central Universities (No. 30106220482).

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Authors and Affiliations

  1. Wollongong Joint Institute, Central China Normal University, Wuhan, China

    Zejun Lu & Jiageng Chen

  2. School of Computer Science, Central China Normal University, Wuhan, China

    Jiageng Chen

Authors
  1. Zejun Lu
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  2. Jiageng Chen
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Correspondence to Jiageng Chen .

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Editors and Affiliations

  1. Technical University of Denmark, Kongens Lyngby, Denmark

    Weizhi Meng

  2. Hong Kong Polytechnic University, Hong Kong, China

    Wenjuan Li

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Lu, Z., Chen, J. (2023). A Privacy-Preserving and Auditable Scheme for Interfacing Public Blockchain with Consortium Blockchain. In: Meng, W., Li, W. (eds) Blockchain Technology and Emerging Technologies. BlockTEA 2022. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 498. Springer, Cham. https://doi.org/10.1007/978-3-031-31420-9_6

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  • DOI: https://doi.org/10.1007/978-3-031-31420-9_6

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