Efficient Quantum Blockchain With a Consensus Mechanism QDPoS

【Author】 Li, Qin; Wu, Jiajie; Quan, Junyu; Shi, Jinjing; Zhang, Shichao

【Source】IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY

【影响因子】7.231

【Abstract】Quantum blockchain is expected to offer an alternative to classical blockchain to resist malicious attacks laughed by future quantum computers. Although a few quantum blockchain schemes have been constructed, their efficiency is low and unable to meet application requirements due to the fact that they lack of a suitable consensus mechanism. To tackle this issue, a consensus mechanism called quantum delegated proof of stake (QDPoS) is constructed by using quantum voting to provide fast decentralization for the quantum blockchain scheme at first. Then an efficient scheme is proposed for quantum blockchain based on QDPoS, where the classical information is initialized as a part of each single quantum state and these quantum states are entangled to form the chain. Compared with previous methods, the designed quantum blockchain scheme is more complete and carried out with higher efficiency, which greatly contributes to better adapting to the challenges of the quantum era.

【Keywords】Quantum computing; Quantum entanglement; Digital signatures; Consensus protocol; Qubit; Computers; Quantum state; Quantum blockchain; consensus mechanism; QDPoS; quantum voting; quantum entanglement

【发表时间】2022

【收录时间】2022-09-29

【文献类型】理论模型

【主题类别】

区块链技术-核心技术-共识机制