Adaptive and Socially-Compliant Trust Management System for Virtual Communities

The e-Society has become a reality. Nowadays, millions of people are actively participating in creating, sharing and interacting in many other different ways among new open and decentralized social structures called Virtual communities. An interaction always bears the risk that one partner exhibits uncooperative or malicious behavior, making trust a critical issue for each participant.


Trust is an important factor among real world communities and increasingly so in virtual environments. With the proliferation of these systems and their increasing importance in our personal and professional life, the trust issue received an increasing interest that gave rise to numerous trust models. Each model tried to represent the information a participant should collect about the others and proposes an evaluation scheme to derive trust from that information.

In human-based virtual communities, participants rely on a various set of information while assessing their degree of trust in each others. That information represent descriptions of other participants' features on which trust requirements are specified to distinguish trustworthy partners from untrustworthy ones. These requirements constitute individual trust policies that are often made implicit, as there is no need for humans to make them explicit. But in this paper, we are more interested in agent-based virtual communities where participants are assisted by software agents that behave on their behalf. In such settings, participants must be able to explicitly specify the trust policies their agents should rely on to derive trust. For that purpose, trust policy languages represent a formal and flexible interface between the human and its agent in the virtual community.

The specification of trust policies in virtual communities is more complex than in distributed systems due to, e.g.:

  • VCs offers two antagonist properties; autonomous individuals with collective objectives.
  • Participants can be resource consumers and resource provider at the same time.
  • Each participant controls the access to its resources using individual policies.
  • No one owns all the resources of the community, so collective policies are used to allow decentralized access control to shared resources.
  • Both individual and collective policies can rapidly become obsolete given the open and evolving nature of these systems (e.g. participants can join and leave at will their communities and the resources are spontaneously created, frequently updated and unpredictably destroyed).

My doctoral research focuses on the problem of designing policies for virtual communities. To address this issue, we propose an agent-based integration of Social Influence Theory and Trust Management Theory concepts. To achieve that, I framed a MAS architecture to support trust management in virtual communities. We used MAS concepts to formalize a theoretical framework for the specification of flexible trust policies where policies are automatically adapted using meta-policies.

Related publications :

 

  • Reda Yaich, Olivier Boissier, Philippe Jaillon and Gauthier Picard, "An Adaptive and Socially-Compliant Trust Management System for Virtual Communities". In The 27th ACM Symposium On Applied Computing (SAC 2012). ACM Press, 2012 [.bib| http]
  • Reda Yaich, Gauthier Picard and Philippe Jaillon, "Social-compliance in trust management within virtual communities". In European Workshop on Multi-agent Systems (EUMAS'11), 2011. [.bib| http]
  • Reda Yaich, Olivier Boissier, Philippe Jaillon and Gauthier Picard, "Gestion de la confiance au sein de communautés virtuelles". In research days of the SIS graduate school, may 2011. (Poster)
  • Reda Yaich, Olivier Boissier, Philippe Jaillon and Gauthier Picard, "Gestion de la confiance et intègration des exigences sociales au sein de communautés virtuelles". In 19es Journées francophones des systèmes multi-agents (JFSMA'11). Cépaduès, 2011.[.bib| http]
  • Reda Yaich, Gauthier Picard and Philippe Jaillon, "Social-compliance in trust management within virtual communities". In 3rd International Workshop on Web Intelligence and Communities (WI&C'11) at the International Conferences on Web Intelligence and Intelligent Agent Technology (WI-IAT 2011), pages 322-325. IEEE Computer Society, 2011.[.bib| http]
  • Reda Yaich, Olivier Boissier, Philippe Jaillon and Gauthier Picard, "Trust Management in Virtual Communities: Adaptive and Socially-Compliant TMS", EMSE Technical Report N° 2011-700 -005, 2011.[.bib| http]
  • Reda Yaich, Olivier Boissier, Philippe Jaillon and Gauthier Picard, "Toward an adaptive trust policy model for open and decentralized virtual communities", In Liquid Proceedings of the Interdisciplinary Workshop on Trust and Reputation, 2010.[.bib| http]
  • Edition : Tina Balke, Reda Yaich,"EASSS Student Session Proceedings" Proceedings of the 12th European Agent Systems Summer School Student Session, 2010.[.bib| http]