Blockchain Security when Messages are Lost
Blockchain Security when Messages are Lost
复制标题
消息丢失时的区块链安全
DOI:
10.1145/3560829.3563557
复制
发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Hajek, Bruce
中科院分区:
文献类型:
--
作者:
Ameen, Taha;Sankagiri, Suryanarayana;Hajek, Bruce
Security analyses for consensus protocols in blockchain research have primarily focused on the synchronous model, where point-to-point communication delays are upper bounded by a known finite constant. These models are unrealistic in noisy settings, where messages may be lost (i.e. incur infinite delay). In this work, we study the impact of message losses on the security of the proof-of-work longest-chain protocol. We introduce a new communication model to capture the impact of message loss called the 0-∞ model, and derive a region of tolerable adversarial power under which the consensus protocol is secure. The guarantees are derived as a simple bound for the probability that a transaction violates desired security properties. Specifically, we show that this violation probability decays almost exponentially in the security parameter. Our approach involves constructing combinatorial objects from blocktrees, and identifying random variables associated with them that are amenable to analysis. This approach improves existing bounds and extends the known regime for tolerable adversarial threshold in settings where messages may be lost.
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DOI:
10.1145/3372297.3417290
发表时间:
2020
期刊:
CCS '20: Proceedings of the 2020 ACM SIGSAC Conference on Computer and Communications Security
影响因子:
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作者:
Dembo, Amir;Kannan, Sreeram;Tas, Ertem Nusret;Tse, David;Viswanath, Pramod;Wang, Xuechao;Zeitouni, Ofer
通讯作者:
Zeitouni, Ofer
DOI:
10.1137/1.9781611975994.69
发表时间:
2020
期刊:
Proceedings of the 2020 ACM-SIAM Symposium on Discrete Algorithms
影响因子:
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作者:
Blum, Erica;Kiayias, Aggelos;Moore, Cristopher;Quader, Saad;Russell, Alexander
通讯作者:
Russell, Alexander
影响因子:
--
作者:
Suryanarayana Sankagiri;Shreyas Gandlur;B. Hajek
通讯作者:
B. Hajek
DOI:
10.1145/3479722.3480992
发表时间:
2020
期刊:
Proceedings of the 3rd ACM Conference on Advances in Financial Technologies
影响因子:
--
作者:
Jing Li;Dongning Guo;Ling Ren
通讯作者:
Ling Ren