Abstract
In this paper, a novel quantum blockchain scheme is proposed to optimize the security of blockchain. Firstly, we propose the definition of quantum blockchain and provide its construction in detail. Additionally, its advantages are also summarized in this work. Secondly, based on the quantum no-cloning theorem, we define a new type of cryptocurrency which we call it quantum coin. Meanwhile, we adopt quantum entanglement and DPoS to design a novel quantum blockchain scheme. At last, we analyze the security of this proposed scheme in terms of the secret keys and quantum coin. It is shown that some attacks, such as man-in-the-middle attack, double spending attack and state-estimation attack, can be resisted. More specifically, under quantum computing attacks, the scheme is also secure. To sum up, through the principles of quantum cryptography and DPoS, this novel quantum blockchain obviously provides better security and higher efficiency.
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Acknowledgements
This work is supported by the NSFC (Grant Nos. 61671087, 61962009), the Open Foundation of Guizhou Provincial Key Laboratory of Public Big Data (Grant Nos. 2018BDKFJJ018, 2019BDKFJJ010, 2019BDKFJJ014), the Open Research Project of the State Key Laboratory of Media Convergence and Communication, Communication University of China, China (Grant No. SKLMCC2020KF006), the BUPT Excellent Ph.D. Students Foundation (Grant No. CX2019232), the High-quality and Cutting-edge Disciplines Construction Project for Universities in Beijing (Internet Information, Communication University of China) and the Fundamental Research Funds for the Central Universities (Grant No. 2019XD-A02).
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Gao, YL., Chen, XB., Xu, G. et al. A novel quantum blockchain scheme base on quantum entanglement and DPoS. Quantum Inf Process 19, 420 (2020). https://doi.org/10.1007/s11128-020-02915-y
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DOI: https://doi.org/10.1007/s11128-020-02915-y