PISTIS: an event-triggered real-time Byzantine-resilient protocol suite

Research output: Contribution to journalArticlepeer-review


  • David Kozhaya
  • Jérémie Decouchant
  • Vincent Rahli
  • Paulo Jorge Esteves Veríssimo

Colleges, School and Institutes

External organisations

  • ABB
  • TU Delft
  • King Abdullah University of Science and Technology


The accelerated digitalisation of society along with technological evolution have extended the geographical span of cyber-physical systems. Two main threats have made the reliable and real-time control of these systems challenging: (i) uncertainty in the communication infrastructure induced by scale, and heterogeneity of the environment and devices; and (ii) targeted attacks maliciously worsening the impact of the above-mentioned communication uncertainties, disrupting the correctness of real-time applications. This paper addresses those challenges by showing how to build distributed protocols that provide both real-time with practical performance, and scalability in the presence of network faults and attacks, in probabilistic synchronous environments. We provide a suite of real-time Byzantine protocols, which we prove correct, starting from a reliable broadcast protocol, called PISTIS, up to atomic broadcast and consensus. This suite simplifies the construction of powerful distributed and decentralized monitoring and control applications, including state-machine replication. Extensive empirical simulations showcase PISTIS's robustness, latency, and scalability. For example, PISTIS can withstand message loss (and delay) rates up to 50% in systems with 49 nodes and provides bounded delivery latencies in the order of a few milliseconds.


Original languageEnglish
JournalIEEE Transactions on Parallel and Distributed Systems
Early online date4 Feb 2021
Publication statusE-pub ahead of print - 4 Feb 2021