Netinfo Security ›› 2022, Vol. 22 ›› Issue (12): 67-75.doi: 10.3969/j.issn.1671-1122.2022.12.008

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Data Privacy-Preserving Scheme on Blockchain for Heterogeneous Multi-Chain

WANG Sidie1, MA Zhaofeng1(), LUO Shoushan1, XU Danheng2   

  1. 1. The School of Cyberspace Security, Beijing University of Posts and Telecommunications, Beijing 100876, China
    2. Hangzhou Ancun Network Technology Co., Ltd., Hangzhou 310000, China
  • Received:2022-09-08 Online:2022-12-10 Published:2022-12-30
  • Contact: MA Zhaofeng E-mail:mzf@bupt.edu.cn

Abstract:

In order to solve the problem of heterogeneous blockchain data privacy security, under the application scenario of knowledge payment, this paper proposed two data privacy protection schemes that support heterogeneous multi-chain, realizing knowledge sharing in the alliance chain and knowledge payment on the public chain. In the scheme, IPFS system was used to store knowledge files, which solved the problem of overloaded blockchain storage. In addition, in order to avoid the problem that the traditional public key encryption mechanism encrypts data for many times and repeatedly encrypts the data on the chain, this scheme used proxy re-encryption technology to achieve data sharing between the two parties involved. At the end of the paper, the author analyzed the security and performance of the method proposed in this paper from both theoretical and practical aspects.

Key words: blockchain, privacy-preserving, heterogeneous multi-chain, proxy re-encryption

CLC Number: