Brief Announcement: Null Messages, Information and Coordination

Authors Raïssa Nataf, Guy Goren, Yoram Moses

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Author Details

Raïssa Nataf
  • Technion, Haifa, Israel
Guy Goren
  • Technion, Haifa, Israel
Yoram Moses
  • Technion, Haifa, Israel

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Raïssa Nataf, Guy Goren, and Yoram Moses. Brief Announcement: Null Messages, Information and Coordination. In 36th International Symposium on Distributed Computing (DISC 2022). Leibniz International Proceedings in Informatics (LIPIcs), Volume 246, pp. 49:1-49:3, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2022)


This paper investigates how null messages can transfer information in fault-prone synchronous systems. The notion of an f-resilient message block is defined and is shown to capture the fundamental communication pattern for knowledge transfer. In general, this pattern combines both null messages and explicit messages. It thus provides a fault-tolerant extension of the classic notion of a message-chain. Based on the above, we provide tight necessary and sufficient characterizations of the generalized communication patterns that can serve to solve the distributed tasks of (nice-run) Signalling and Ordered Response.

Subject Classification

ACM Subject Classification
  • Theory of computation → Distributed algorithms
  • Computing methodologies → Reasoning about belief and knowledge
  • null messages
  • fault tolerance
  • coordination
  • information flow


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