Synchronous Byzantine Lattice Agreement in O(log(f )) Rounds - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Communication Dans Un Congrès Année : 2020

Synchronous Byzantine Lattice Agreement in O(log(f )) Rounds

Résumé

In the Lattice Agreement (LA) problem, originally proposed by Attiya et al. [1], a set of processes has to decide on a chain of a lattice. More precisely, each correct process proposes an element e of a certain join-semi lattice L and it has to decide on a value that contains e. Moreover, any pair pi, pj of correct processes has to decide two values deci and decj that are comparable (e.g., deci ≤ decj or decj < deci). In this paper we present new contributions for the synchronous case. We investigate the problem in the usual message passing model for a system of n processes with distinct unique IDs. We first prove that, when only authenticated channels are available, the problem cannot be solved if f = n/3 or more processes are Byzantine. We then propose a novel algorithm that works in a synchronous system model with signatures (i.e., the authenticated message model), tolerates up to f byzantine failures (where f < n/3) and that terminates in O(log f) rounds. We discuss how to remove authenticated messages at the price of algorithm resiliency (f < n/4). Finally, we present a transformer that converts any synchronous LA algorithm to an algorithm for synchronous Generalised Lattice Agreement.
Fichier principal
Vignette du fichier
main.pdf (1.91 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-02473843 , version 1 (11-02-2020)

Identifiants

  • HAL Id : hal-02473843 , version 1

Citer

Giuseppe Antonio Di Luna, Emmanuelle Anceaume, Silvia Bonomi, Leonardo Querzoni. Synchronous Byzantine Lattice Agreement in O(log(f )) Rounds. ICDCS 2020 - 40th IEEE International Conference on Distributed Computing Systems, IEEE, Nov 2020, Singapore, Singapore. pp.1-11. ⟨hal-02473843⟩
156 Consultations
161 Téléchargements

Partager

Gmail Mastodon Facebook X LinkedIn More