License: Creative Commons Attribution 3.0 Unported license (CC BY 3.0)
When quoting this document, please refer to the following
DOI: 10.4230/LIPIcs.DISC.2019.39
URN: urn:nbn:de:0030-drops-113460
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Cachin, Christian ; Tackmann, Björn

Brief Announcement: Asymmetric Distributed Trust

LIPIcs-DISC-2019-39.pdf (0.3 MB)


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.

BibTeX - Entry

  author =	{Christian Cachin and Bj{\"o}rn Tackmann},
  title =	{{Brief Announcement: Asymmetric Distributed Trust}},
  booktitle =	{33rd International Symposium on Distributed Computing (DISC 2019)},
  pages =	{39:1--39:3},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-126-9},
  ISSN =	{1868-8969},
  year =	{2019},
  volume =	{146},
  editor =	{Jukka Suomela},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{},
  URN =		{urn:nbn:de:0030-drops-113460},
  doi =		{10.4230/LIPIcs.DISC.2019.39},
  annote =	{Keywords: Quorums, consensus, distributed trust, blockchains, cryptocurrencies}

Keywords: Quorums, consensus, distributed trust, blockchains, cryptocurrencies
Collection: 33rd International Symposium on Distributed Computing (DISC 2019)
Issue Date: 2019
Date of publication: 08.10.2019

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