3 J. Debenham Carles Sierra 2008 5th International Conference on Trust, Privacy & Security in Digital Business, TrustBus 2008 Torino, Italy 8-17 A pair of ‘trust maps’ give a ?ne-grained view of an agent’s accu- <br /> mulated, time-discounted belief that the enactment of commitments by another <br /> agent will be in-line with what was promised, and that the observed agent will act <br /> in a way that respects the con?dentiality of previously passed information. The <br /> structure of these maps is de?ned in terms of a categorisation of utterances and <br /> the ontology. Various summary measures are then applied to these maps to give a <br /> succinct view of trust. <br />