Research Area:  Blockchain Technology

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.

Keywords:  

Author(s) Name:  Yu-Long Gao, Xiu-Bo Chen, Gang Xu, Kai-Guo Yuan, Wen Liu & Yi-Xian Yang

Publisher name:  Springer

DOI:  10.1007/s11128-020-02915-y

Volume Information:  volume 19, Article number: 420 (2020)

Paper Link:   https://link.springer.com/article/10.1007/s11128-020-02915-y