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.
|Title of host publication||Proceedings of the 11th International Conference on Autonomous Agents and Multiagent Systems|
|Publisher||International Foundation for Autonomous Agents and Multiagent Systems|
|Number of pages||2|
|ISBN (Print)||0-9817381-3-3, 978-0-9817381-3-0|
|Publication status||Published - 2012|
- delegation chains
Burnett, C., & Oren, N. (2012). Sub-delegation and trust. In Proceedings of the 11th International Conference on Autonomous Agents and Multiagent Systems (Vol. 3, pp. 1359-1360). International Foundation for Autonomous Agents and Multiagent Systems. http://www.ifaamas.org/Proceedings/aamas2012/print/volume3.pdf