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作 者:SHI Liucheng GUO Zhaozhong
机构地区:[1]School of Mathematical Sciences,Peking University,Beijing 100871,China
出 处:《Chinese Journal of Electronics》2020年第5期887-898,共12页电子学报(英文版)
基 金:supported by the National Key R&D Program of China(No.2017YFB0802000);the National Natural Science Foundation of China(No.61672059).
摘 要:Proof of stake(PoS),aiming at replacing Proof of work(PoW)in blockchain consensus,has drawn great attention from academia and industry.We present"Baguena",a novel PoS protocol for public blockchain with high practicality and security.It uses a special designed algorithm with proper ties of uniqueness and anonymity for leader selection,and uses the longest chain rule for chain selection.Besides,entropy is introduced to prevent manipulation of leader selection process by simulating a random beacon based on Publicly verifiable secret sharing(PVSS)and threshold signature with only a linear number of exponentiations.We analyze the protocol's security by a threat model and design a robust delegation mechanism based on triple Elliptic curve digital signature algorithm(ECDSA)proxy signature.We implement Baguena and evaluate its performance on 100 Amazon EC2 virtual machines simulating 50k users,which shows that Baguena confirms transactions in 2 minutes,achieves 2.16x of Algorand's throughput and 6.95X of Ouroboros'throughput.
关 键 词:Blockchain CONSENSUS Proof of stake Delegation.
分 类 号:TP311.13[自动化与计算机技术—计算机软件与理论]
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