Evaluating User Representations for the Trustworthiness of Interaction Partners

Trust in Ubiquitous Computing is about finding trustworthy partners for risky interactions in presence of uncertainty about identity, motivation, and goals of the potential interactions partners. For the integration of users in the selection of interaction partners it is not sufficient to provide robust algorithms for trust establishment in service provision and recommendations, but there is a need for a user interface, which allows for intuitive interpretation of the collected information about the trustworthiness of the potential interaction partners. In this paper, we evaluate three representations for trust based on collected evidences in a user study. The results show that the graphical representation which we have developed for our trust model, called CertainTrust, fits to the needs of the users. Author