In order to cooperate in the open distributed environment, truster agents need to be aware trustworthiness of trustee agents for selecting suitable interaction partners. Most of the current computational trust models make use of the truster itself experience or reputation from community on trustees to compute the trust values. However, in some circumstances, a truster agent may have no experien...

Existing computational trust systems analyze information networks to determine the “trustworthiness” of the nodes, but the scalar values they produce are both opaque and semantically variable, and knowing only that the trustworthiness of a website is “27” is not helpful to the user. Moreover, the simplistic means by which they are typically calculated can yield misleading results, sometimes dra...

One inherent problem with virtual communities is how to assess the trustworthiness of unknown peers. Reputation based trust mechanisms are one means to help users decide whether to rely on a stranger or not. Using eBay’s feedback forum as an example, we show how simple reputation based trust mechanisms work. We evaluate shortcomings of these mechanisms and give an overview of reasonable enhance...

We propose a framework to study Markovian trust value dynamics in a centralized Computational Trust and Reputation (CTR) scheme under trust-unaware partner selection using a mean-value approximation. Analytically founded answers are sought to questions like: Can dishonest agents subvert the CTR scheme (i.e., acquire higher trust values than honest agents)? Is indirect reciprocity incentivized? ...

Without trust, pervasive devices cannot collaborate effectively, and without collaboration, the pervasive computing vision cannot be made a reality. Distributed trust frameworks may support trust and thus foster collaboration in an hostile pervasive computing environment. Existing frameworks deal with foundational properties of computational trust. We here propose a distributed trust framework ...

Trust and reputation systems are not only useful for Virtual Organisations (VOs), but VOs also for trust and reputation mechanisms. The structure provided by a VO can be used to construct more effective trust mechanisms. In particular, the structural elements defined in a VO (e.g., roles and interactions) provide a certain notion of similarity which allows agents to infer the expected behaviour...

In ambient environments, new security challenges that are not adequately addressed by existing security models appear. In such context, intelligent communication devices participate to spontaneous and self-organized networks where unexpected interactions with unknown devices take plcice. Without centralized organization, security turns in a risk management problem. In this paper we propose and ...

The community of multi-agent systems has been studying ways to improve the selection of partner agents for joint action. One of such approaches consists in estimating the trustworthiness of potential partners in order to decrease the risk inherent to interacting with unknown agents. In this paper, we study the effect of using trust in the process of selecting partners in electronic business. We...