Sub-delegation and trust

Christopher Burnett, Nir Oren

Research output: Chapter in Book/Report/Conference proceedingPublished conference contribution


Trust mechanisms can allow an agent to identify the most trustworthy entity to which a task should be delegated. Now this entity may further delegate the task, ultimately resulting in a delegation chain representing the sub-delegation process. Such delegation chains present a problem for current trust evaluation mechanisms, as they typically which reward or penalise a single agent rather than sharing responsibility among all members of the delegation chain. As a result, decisions made on such incorrect trust values would not be optimal, leading to degraded system performance. In this paper we investigate the effects of sub-delegation on a probabilistic trust model and propose a model of weighting trust updates based on shared responsibility. We evaluate this model in the context of a simulated multi-agent system and describe how different weighting strategies can affect probabilistic trust updates when sub-delegation is possible.
Original languageEnglish
Title of host publicationProceedings of the 11th International Conference on Autonomous Agents and Multiagent Systems
PublisherInternational Foundation for Autonomous Agents and Multiagent Systems
Number of pages2
ISBN (Print)0-9817381-3-3, 978-0-9817381-3-0
Publication statusPublished - 2012


  • trust
  • delegation chains


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