Multi-party trust computation in decentralized environments in the presence of malicious adversaries

Dimitriou, T. and Michalas, A. 2013. Multi-party trust computation in decentralized environments in the presence of malicious adversaries. Ad Hoc Networks . 15 (2014), pp. 53-66. doi:10.1016/j.adhoc.2013.04.013

TitleMulti-party trust computation in decentralized environments in the presence of malicious adversaries
AuthorsDimitriou, T. and Michalas, A.
Abstract

In this paper, we describe a decentralized privacy-preserving protocol for securely casting trust ratings in distributed reputation systems. Our protocol allows n participants to cast their votes in a way that preserves the privacy of individual values against both internal and external attacks. The protocol is coupled with an extensive theoretical analysis in which we formally prove that our protocol is resistant to collusion against as many as n-1 corrupted nodes in both the semi-honest and malicious adversarial models.

The behavior of our protocol is tested in a real P2P network by measuring its communication delay and processing overhead. The experimental results uncover the advantages of our protocol over previous works in the area; without sacrificing security, our decentralized protocol is shown to be almost one order of magnitude faster than the previous best protocol for providing anonymous feedback.

KeywordsDecentralized Reputation Systems
Security
Voter Privacy
Anonymous feedback
JournalAd Hoc Networks
Journal citation15 (2014), pp. 53-66
ISSN1570-8705
Year2013
PublisherElsevier
Accepted author manuscriptDimitriou_Michalas_AdHocNetworks_2013.pdf
Digital Object Identifier (DOI)doi:10.1016/j.adhoc.2013.04.013
Web address (URL)http://www.sciencedirect.com/science/article/pii/S157087051300098X
Publication dates
PublishedApr 2014

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