Trust and Reputation in Multi-Agent Systems

Trust and reputation are a key ingredient to most multi-agent systems, and as such, many different metrics have been proposed in academic literature. This paper describes 5 such metrics: those outlined by Marsh, Sen et al., as well as SPORAS, that used in eBay, and certified reputation. An evaluation of the field as a whole is then provided, which outlines just how important trust and reputation are to the field.