文章基本信息

标题：Brief Announcement: Asymmetric Distributed Trust
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作者：Christian Cachin ; Bj{"o}rn Tackmann
期刊名称：LIPIcs : Leibniz International Proceedings in Informatics
电子版ISSN：1868-8969
出版年度：2019
卷号：146
页码：1-3
DOI：10.4230/LIPIcs.DISC.2019.39
出版社：Schloss Dagstuhl -- Leibniz-Zentrum fuer Informatik
摘要：Quorum systems are a key abstraction in distributed fault-tolerant computing for capturing trust assumptions. They can be found at the core of many algorithms for implementing reliable broadcasts, shared memory, consensus and other problems. This paper introduces asymmetric Byzantine quorum systems that model subjective trust. Every process is free to choose which combinations of other processes it trusts and which ones it considers faulty. Asymmetric quorum systems strictly generalize standard Byzantine quorum systems, which have only one global trust assumption for all processes. This work also presents protocols that implement abstractions of shared memory and broadcast primitives with processes prone to Byzantine faults and asymmetric trust. The model and protocols pave the way for realizing more elaborate algorithms with asymmetric trust.
关键词：Quorums; consensus; distributed trust; blockchains; cryptocurrencies