Group-Agreement as a Reliability Measure for Witness Recommendations in Reputation-Based Trust Protocols

摘要

Interactions between individuals are inherently dependent upon trust, no matter if they occur in the real world or in cybercom-munities. Over the past years, proposals have been made to model trust relations computationally, either to assist users or for modeling purposes in multi-agent systems. These models rely implicitly on the social networks established by participating entities (be they autonomous agents or internet users). However, state-of-the-art trust frameworks often neglect the structure of those complex networks. In this paper, we present a new approach allowing agent-based trust frameworks to leverage information from both trusted and untrusted witnesses that would otherwise be neglected. An effective and robust voting scheme based on an agreement metric is presented and its benefit is shown through simulations.