Computer Science

Computer Science ›› 2021, Vol. 48 ›› Issue (11A): 547-551.doi: 10.11896/jsjkx.201200138

• Information Security • Previous Articles     Next Articles

Block-chain Privacy Protection Scheme Based on Lightweight Homomorphic Encryption and Zero-knowledge Proof

WANG Rui-jin1, TANG Yu-cheng1, PEI Xi-kai2, GUO Shang-tong1, ZHANG Feng-li1   

  1. 1 School of Information and Software Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China
    2 Chengdu Civil Aviation Air Traffic Control Technology Development Co.,Ltd.,Chengdu 610041,China
  • Online:2021-11-10 Published:2021-11-12
  • About author:WANG Rui-jin,born in 1980,Ph.D,associate professor.His main research interests include blockchain,edge computing,data processing,etc.
  • Supported by:
    National Natural Science Foundation of China(61802033,61472064,61602096),Regional Innovation Cooperation Project of Sichuan Province(2020YFQ0018),Key Research and Development Support Project of Sichuan Science and Technology Plan(2020YFG0475,2018GZ0087,2019YJ0543,QKLY-02-2020-030),Postdoctoral Foundation(2018M643453),National Key Laboratory Project of Guangdong Province(2017B030314131),Open project of Key Laboratory of Network and Data Security of Sichuan Province(NDSMS201606) and Key Research and Development Support Project of Chengdu(2019-YF05-02105-GX).

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Abstract: In order to solve the problem of block-chain privacy protection and its efficiency,this paper proposes a privacy protection scheme based on lightweight homomorphic encryption and zero-knowledge proof.The scheme improves the homomorphic encryption algorithm to reduce the time of key generation and encryption,and introduces zero-knowledge proof to avoid invalid homomorphic operation.After the lightweight homomorphic encryption,the private data will be written into the block in the form of ciphertext,it is uploaded to the blockchain network by the node that gets the bookkeeping right.The scheme makes up for the lack of data disclosure in blockchain network and improves the efficiency.By analyzing the security of the scheme,it is proved that the scheme has the characteristics of unforgeability and privacy data security.Through the performance simulation experiment and theoretical deduction,it is proved that the low efficiency in the process of distributing,sharing and computing private data in ciphertext state has been improved,and it is more effective to protect the privacy of customers than the traditional DRM.

Key words: Blockchain, Digital rights, Lightweight homomorphic encryption, Privacy protection, Zero knowledge proof

CLC Number: 

  • TP309
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