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Abstract
Trust and trustworthiness are central notions in Human-Centric
Communication: users accept a service in their everyday life - and may
be willing to pay for it - only if they perceive that they can trust
the service providers and the involved technologies. On the one hand,
trust itself is the transdisciplinary result of technical,
sociological and legal aspects. As such, trust is a rather informal
concept to start with. On the other hand, the establishment of trust
relationships necessitates omnipresent certification; trust
relationships must be established, verified, monitored, maintained
and, if necessary, certifiably adapted during any further
evolution. To this end, trust inevitably requires formalization, best
in the form of comprehensive formal models.
There are first approaches to trust formalization, which allow to
reason about trust and trust policies. These approaches have however
deficiencies when it comes to contexts of communication, roles in
communication and groups of communicators, which are central notions
in communication spaces. Hence, trust models have to be extended
accordingly.
The H-C3 exploratory project on Trust Models investigates definitions
of comprehensive and comprehensible models of trust for complex
communication spaces as a basis for the development of techniques for
the validation (by means of testing) and verification (by means of
proof) of such models.
