基于DPoS扩展的量子加密区块链

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...

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

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.