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An Improved Byzantine Agreement Algorithm for Synchronous Systems with Mobile Faults

by Nazreen Banu, Samia Souissi, Taisuke Izumi
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 43 - Number 22
Year of Publication: 2012
Authors: Nazreen Banu, Samia Souissi, Taisuke Izumi
10.5120/6400-8878

Nazreen Banu, Samia Souissi, Taisuke Izumi . An Improved Byzantine Agreement Algorithm for Synchronous Systems with Mobile Faults. International Journal of Computer Applications. 43, 22 ( April 2012), 1-7. DOI=10.5120/6400-8878

@article{ 10.5120/6400-8878,
author = { Nazreen Banu, Samia Souissi, Taisuke Izumi },
title = { An Improved Byzantine Agreement Algorithm for Synchronous Systems with Mobile Faults },
journal = { International Journal of Computer Applications },
issue_date = { April 2012 },
volume = { 43 },
number = { 22 },
month = { April },
year = { 2012 },
issn = { 0975-8887 },
pages = { 1-7 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume43/number22/6400-8878/ },
doi = { 10.5120/6400-8878 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T20:33:57.699650+05:30
%A Nazreen Banu
%A Samia Souissi
%A Taisuke Izumi
%T An Improved Byzantine Agreement Algorithm for Synchronous Systems with Mobile Faults
%J International Journal of Computer Applications
%@ 0975-8887
%V 43
%N 22
%P 1-7
%D 2012
%I Foundation of Computer Science (FCS), NY, USA
Abstract

We study the problem of Byzantine agreement in synchronous systems where malicious agents can move from one process to another and try to corrupt them. This model is known as mobile Byzantine faults. In a previous result [10], Garay has shown that n > 6t (n is the total number of processes, and t is the number of mobile faults) is sufficient to solve this problem even in the presence of strong agents. These agents can move at full speed (in the sense that each agent can take a movement in every round) and can make corrupted processes forget that they run the algorithm (as a result, after recovery a process must learn the current state of computation including the code from other processes). Many following results [3] have improved the above result but with some additional assumptions such as a corrupted process must recover and learn the current state of computation before another process can fail instead of it. The question, whether the result of Garay can be improved without any additional assumption, remains open. In this paper, we answer this question by providing an algorithm MBA that works with n > 4t.

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Index Terms

Computer Science
Information Sciences

Keywords

Synchronous Systems Agreement(consensus) Problem Mobile Byzantine Adversary

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