Building a reputation-based bootstrapping mechanism for newcomers in collaborative alert systems

  • Authors:
  • Manuel Gil Pérez;Félix Gómez Mármol;Gregorio Martínez Pérez;Antonio F. Skarmeta Gómez

  • Affiliations:
  • Departamento de Ingeniería de la Información y las Comunicaciones, University of Murcia, 30071 Murcia, Spain;NEC Europe Ltd., Kurfürsten-Anlage 36, 69115 Heidelberg, Germany;Departamento de Ingeniería de la Información y las Comunicaciones, University of Murcia, 30071 Murcia, Spain;Departamento de Ingeniería de la Información y las Comunicaciones, University of Murcia, 30071 Murcia, Spain

  • Venue:
  • Journal of Computer and System Sciences
  • Year:
  • 2014

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Abstract

Today trust is a key factor in distributed and collaborative environments aimed to model participating entities@? behavior, and to foresee their further actions. Yet, prior to the first interaction of a newcomer in the system trust and reputation models face a great challenge: how to assign an accurate initial reputation to a newcomer? The answer needs to tackle two well-known problems: cold-start and reputation bootstrapping. Cold-start is a common issue to any system when newcomers boot for the first time, while reputation bootstrapping especially affects highly distributed scenarios, where mobile entities travel across domains and collaborate with a number of them. In this paper we focus on the two problems, which are addressed through a novel reputation bootstrapping mechanism for newcomers in a collaborative alert system aimed at detecting distributed threats. Experiments confirm the accuracy of our proposal as well as its robustness in the presence of ill-intentioned entities.