The Data Exchange Protocol over Multi-chain Blockchain Using Zero-Knowledge Proof

Ao Xuan Li, Gabriele D’Angelo, Su Kit Tang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The implementation of blockchain technology is becoming popular among cyber-physical systems. However, the current solutions suffer from scalability and privacy issues. In this position paper, we leverage zero-knowledge proof and multichain technology to propose an efficient system for data transferring across different components. Each component may maintain a private chain storing its data, and the system acts as a relayer between different chains, in which multiple private chains are efficient for appending new data. Only encrypted data is transferred from a source chain to a destination chain. The relayer handles data transferring in two phases: send and receive, and the relayer keeps a Merkle tree of all sent data. In fact, it only transfers the data if the receiver can submit a valid zero-knowledge proof that proves the ownership of the data. The zero-knowledge proof discloses nothing but the statement is true; therefore it protects anonymity for the data owners. This system is secure and satisfies relevant properties such as ledger indistinguishability, transaction non-malleability, and matchability.

Original languageEnglish
Title of host publicationEdge Computing and IoT
Subtitle of host publicationSystems, Management and Security - 3rd EAI International Conference, ICECI 2022, Proceedings
EditorsZhu Xiao, Xingxia Dai, Jinmei Shu, Ping Zhao
PublisherSpringer Science and Business Media Deutschland GmbH
Number of pages12
ISBN (Print)9783031289897
Publication statusPublished - 2023
Event3rd EAI International Conference on Edge Computing and IoT, EAI ICECI 2022 - Virtual, Online
Duration: 13 Dec 202214 Dec 2022

Publication series

NameLecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST
Volume478 LNICST
ISSN (Print)1867-8211
ISSN (Electronic)1867-822X


Conference3rd EAI International Conference on Edge Computing and IoT, EAI ICECI 2022
CityVirtual, Online


  • Blockchain
  • Cyber-physical system
  • Multichain
  • Zero-knowledge proof


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