广东工业大学学报 ›› 2021, Vol. 38 ›› Issue (02): 34-38.doi: 10.12052/gdutxb.200068

• 综合研究 • 上一篇    下一篇

基于DPoS扩展的量子加密区块链

陈冰儿, 王帮海, 劳南新   

  1. 广东工业大学 计算机学院, 广东 广州 510006
  • 收稿日期:2020-05-06 出版日期:2021-03-10 发布日期:2021-01-13
  • 通信作者: 王帮海(1974-),男,教授,主要研究方向为量子计算、量子信息、量子机器学习,E-mail:bhwang@gdut.edu.cn E-mail:bhwang@gdut.edu.cn
  • 作者简介:陈冰儿(1992-)，女，硕士研究生，主要研究方向为量子计算、量子信息、区块链
  • 基金资助:
    国家自然科学基金面上项目(61672007)

A Quantum-encrypted Blockchain Based on Delegated Proof of Stake (DPoS) Extension

Chen Bing-er, Wang Bang-hai, Lao Nan-xin   

  1. School of Computers, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2020-05-06 Online:2021-03-10 Published:2021-01-13

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摘要： 区块链技术的安全性依赖基于数学计算单向困难性的加密算法, 其在量子计算机的指数级加速下暴露出脆弱性。虽然已有一系列抗量子攻击区块链被提出, 但它们往往建设成本高昂, 不利于普及推广。对此, 提出了基于委托权益证明(Delegated Proof of Stake, DPoS)扩展的量子加密区块链, 相比于Kiktenko等的原始量子安全区块链, 所需建设的量子密钥分发(Quantum Key Distribution, QKD)信道数量由$ O({n}^{2}) $降低到$ O\left(n\right) $, 所需进行的通信轮数上限由$ n/3+1 $降低为$ k/3+1 $, 显著降低了量子加密区块链的建设成本, 提升了其运行效率与拓展能力。

关键词: 区块链, 委托权益证明, 分布式, 量子密码学

Abstract: The security of blockchain technology, depending on the encryption algorithms based on the one-way mathematical calculation difficulty, is vulnerable to the attack under exponential acceleration of quantum computers. Although a series of anti-quantum attack blockchains have been proposed, they are often too expensive to build and are not conducive to popularization. In this regard, a quantum-encrypted blockchain based on delegated proof of stake (DPoS) extension is proposed. Comparing with the original quantum-secured blockchain proposed by Kiktenko, the number of quantum key distribution (QKD) channels needed to be built is reduced from $O({n}^{2})$ to $ O\left(n\right) $, and the maximum number of communication rounds required is reduced from $ n/3+1 $ to $ k/3+1 $. It significantly reduces the construction cost, and improves the operation efficiency and expansion ability.

Key words: blockchain, delegated proof of stake, distributed technology, quantum cryptography

中图分类号: 

  • TP393.02
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