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MACT: A multi-channel anonymous consensus based on Tor

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Abstract

As the core of blockchain technology, consensus mechanism determines the security, stability and availability of the system. Most of consensus mechanism including Po-X, X-BFT and so on mainly focuses on the design and improvement of the consensus layer, ignoring the impact of the communication mechanism on consensus efficiency and the privacy protection of the consensus node. It leads to the emergence of node corruption and conspiracy attacks. In this paper, we present MACT, a new multi-channel anonymous consensus mechanism for consortium blockchain. MACT uses anonymous communication mechanism, based on Onion Routing Technology Tor, to protect node privacy and prevent the corruption of consensus nodes. To reduce the computational power consumption, MACT abandons the traditional attempt conversion and mining mechanism, and adopts double ring threshold signature. Besides, to achieve the cross chain management of alliance members as well as the privacy protection of the branch chain ledgers, we improve the distributed ledger of MACT based on directed acyclic graph technology(DAG). Additionally, we design a set of identity authentication mechanism NKC for MACT based on the improved Keberos protocol, which is completely independent of the third party public key infrastructure, reduces the probability of Byzantine nodes to a certain extent. The experiment results demonstrate that MACT can achieve anonymous consensus and has good consensus efficiency.

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Acknowledgements

This work was partially supported by the National Key Project of China (No.2020YFB1005 700) and the National Natural Science Foundation of China for Joint Fund Project (No.U1936218).

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Authors and Affiliations

  1. Artificial intelligence and blockchain Research Institute, Guangzhou University, Building C2, Gaoxin intellectual innovation park, No. 1, Guangzhou, China

    Xingyu Li & Jin Li

  2. Lingchuang street, Zhongxin Guangzhou Knowledge City, Huangpu District, Guangzhou City, Guangdong Province, China

    Xingyu Li & Jin Li

  3. School of Computer Science and Cyber Engineering, Guangzhou University, Zhonghuan West Road, Panyu District, Guangzhou City, Guangdong Province, China

    Ziyu Zheng & Pengyu Cheng

  4. Hangzhou Dianzi University is located at 1158, 2nd Street, Jianggan District, Hangzhou, Zhejiang, China

    Lin You

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  1. Xingyu Li
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Li, X., Zheng, Z., Cheng, P. et al. MACT: A multi-channel anonymous consensus based on Tor. World Wide Web 26, 1005–1029 (2023). https://doi.org/10.1007/s11280-021-00975-3

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  • DOI: https://doi.org/10.1007/s11280-021-00975-3

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