@inproceedings{ec7e4b78df6041b9b3cd02a58c054015,
title = "A Combined Micro-block Chain Truncation Attack on Bitcoin-NG",
abstract = "Bitcoin-NG, introduced by Eyal et al. in NSDI 2016, divides a blockchain into key-blocks and micro-blocks to improve transaction process efficiency. In this paper, we propose a novel attack on Bitcoin-NG, called a micro-block chain truncation attack. Combined with key-block selfish and stubborn mining, and an eclipse attack, this attack is able to bring extra reward to attackers in Bitcoin-NG than in Bitcoin through a colluded strategy or a “destroyed if no stake” strategy. Our evaluation calculates the reward proportion of an attacker by these attacks on both Bitcoin-NG and Bitcoin, which helps us figure out whether Bitcoin-NG sacrifices security for efficiency promotion. We also evaluate 18 strategy combinations by traversing different values of computation power and practical truncation rate. In a setting with reasonable parameters, the optimal combined micro-block chain truncation attack obtains at most 5.28\% more reward proportion in Bitcoin-NG than in Bitcoin.",
keywords = "Bitcoin-NG, Blockchain security, Micro-block chain",
author = "Ziyu Wang and Jianwei Liu and Zongyang Zhang and Yanting Zhang and Jiayuan Yin and Hui Yu and Wenmao Liu",
note = "Publisher Copyright: {\textcopyright} 2019, Springer Nature Switzerland AG.; 24th Australasian Conference on Information Security and Privacy, ACISP 2019 ; Conference date: 03-07-2019 Through 05-07-2019",
year = "2019",
doi = "10.1007/978-3-030-21548-4\_18",
language = "英语",
isbn = "9783030215477",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
publisher = "Springer Verlag",
pages = "322--339",
editor = "Julian Jang-Jaccard and Fuchun Guo",
booktitle = "Information Security and Privacy - 24th Australasian Conference, ACISP 2019, Proceedings",
address = "德国",
}