Distributed Trust Management for Validating SLA Choreographies

  • Irfan Ul Haq
  • Rehab Alnemr
  • Adrian Paschke
  • Erich Schikuta
  • Harold Boley
  • Christoph Meinel
Conference paper


For business workflow automation in a service-enriched environment such as a grid or a cloud, services scattered across heterogeneous Virtual Organizations (VOs) can be aggregated in a producer-consumer manner, building hierarchical structures of added value. In order to preserve the supply chain, the Service Level Agreements (SLAs) corresponding to the underlying choreography of services should also be incrementally aggregated. This cross-VO hierarchical SLA aggregation requires validation, for which a distributed trust system becomes a prerequisite. Elaborating our previous work on rule-based SLA validation, we propose a hybrid distributed trust model. This new model is based on Public Key Infrastructure (PKI) and reputation-based trust systems. It helps preventing SLA violations by identifying violation-prone services at service selection stage and actively contributes in breach management at the time of penalty enforcement.


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Irfan Ul Haq
    • 1
  • Rehab Alnemr
    • 2
  • Adrian Paschke
    • 3
  • Erich Schikuta
    • 1
  • Harold Boley
    • 4
  • Christoph Meinel
    • 2
  1. 1.Department of Knowledge and Business EngineeringUniversity of ViennaViennaAustria
  2. 2.Hasso Plattner InstitutePotsdam UniversityPotsdamGermany
  3. 3.Institute of Computer ScienceFreie University BerlinBerlinGermany
  4. 4.Institute of Information TechnologyNational Research Council Canada

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