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Signature-Free Communication and Agreement in the Presence of Byzantine Processes (Tutorial) Raynal, Michel Asynchronous system Atomic read/write register Byzantine process Consensus Distributed algorithm Distributed computability Fault-tolerance No-du Communication and agreement are fundamental abstractions in any distributed system. (If the computing entities do not need to communicate or agree in one way or another, the system is not a distributed system!) This tutorial was devoted to the design of such abstractions built on top of signature-free asynchronous distributed systems prone to Byzantine process failures. It is made up of three parts, each devoted to an abstraction and algorithms that implement it. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Michel Raynal 2016 Is Part Of LIPIcs, Volume 46, 19th International Conference on Principles of Distributed Systems (OPODIS 2015) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/LIPIcs.OPODIS.2015.1 urn:nbn:de:0030-drops-65929 https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.OPODIS.2015.1 eng https://creativecommons.org/licenses/by/3.0/legalcode