TwoHop: Metric-Based Trust Evaluation for Peer-to-Peer Collaboration Environments

Glynos, Dimitris; Argyroudis, Patroklos; Douligeris, Christos; O’Mahony, Donal

doi:10.1109/glocom.2008.ecp.382

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…The weights r j and a j represent the review and assessment points associated with an evaluation v j . This is a simpler formula than the one proposed in , which permits faster trust calculations and also allows the application of weights even in the case where only a single evaluation has been collected from the network. …”

Section: The Twohop Trust Metric Architecturementioning

confidence: 99%

“…In this paper, we expand our preliminary investigation of the TwoHop system , which utilizes recommendations of peer nodes in order to evaluate the trustworthiness of service providers. TwoHop assumes that there are direct relations between participants that have interacted in the past, and its goal is to establish indirect relations between unknown participants (i.e., participants without any previous immediate interaction).…”

Section: Introductionmentioning

confidence: 99%

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Collaborative service evaluation with the TwoHop trust framework

Glynos

Argyroudis

Douligeris

2011

Security Comm Networks

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The TwoHop trust framework is a collaborative system for computing trust towards service providers in a peer‐to‐peer network. TwoHop participants share their trust information so that peers without prior interaction may establish indirect trust relationships. TwoHop imposes a limit of two hops on trust delegation chains, which allows for increased efficiency in the trust calculation process. In addition, it provides multiple edges between nodes in the trust graph, allowing for the existence of both service evaluations and recommendations for service evaluators. In this paper, we present an improved version of the TwoHop trust calculation algorithm along with a formal description of its model of trust. We evaluate its key characteristics against those of other trust frameworks and compare it with the EigenTrust algorithm and to an improved version of the PeerTrust algorithm in terms of performance. Our simulation results indicate the robustness of our design against dishonest participants and its ability to scale to accommodate the needs of large peer‐to‐peer networks. Copyright © 2011 John Wiley & Sons, Ltd.

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Section: The Twohop Trust Metric Architecturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Collaborative service evaluation with the TwoHop trust framework

Glynos

Argyroudis

Douligeris

2011

Security Comm Networks

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“…We do not consider camouflaging targets (e.g. sellers), which are considered in Oram [96] or "karma suicide attacks" in Glynos et al [97]. E.g.…”

Section: Modeling Dynamic Attacksmentioning

confidence: 99%

Quantifying and improving the robustness of trust systems

Wang¹

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There are plenty of people that I want to offer my sincere gratitude to. Without them, I may not reach what I have achieved during my PhD. My supervisors, Prof. Yang Liu and Prof. Jie Zhang, have been playing a crucial role in leading me to a qualified researcher. I remember the very beginning of my PhD study, when I was quite new to doing research. Prof. Liu did not force me to study some specific problems immediately. Instead, he provided me freedom to get a wide horizon of the area first. And he allowed me to choose the research problems I like to solve. Prof. Zhang always provide very valuable opinions in evaluating my ideas and paper drafts. He offers me significant guidance on how to make my research more valuable and recognizable. Besides, he is very generous in spending his time on us: from discussing ideas and plans, to helping fix some writing problems. I am very grateful for both Profs supervision in the last four years. Whenever I get myself too relaxed, they remind me that I can do better, without which, I cannot be productive in research. Tim, who was a post-doc when cooperating with me (and now is a lecturer in Oxford), has been very supportive. When I got stuck in small questions or technical problems, he helped to drag me out and taught me how to think in a higher level. As a mentor, he has been showing considerable patience. He would never feel troubled to discuss with me, or teach me how to fix even tedious problems. He has influenced me not only on the way of thinking, but also on exploring for meaningful research. Tim is also a very nice friend, he often invited us to cook, BBQ or have some drinks, and we really enjoyed the time. In a word, it has been my great pleasure to be a friend with him. I also want to thank my TAC members, Prof. Alwen Tiu, Prof. Bo An, and Prof. Rongxin Lu. They supervised my research progress regularly, and brought up questions to help me reflect on my solutions or methods. vii viii During the last four years, I have been surrounded by a group of nice fellows, who are also my friends. I appreciate their company, which enriches my PhD life and brings me beautiful memories. They are

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