Existing approaches to calculate trust between agents rely on the strength of their relationships based on their degrees of friendship, the frequencies of their interactions, the sentiments extracted from their interactions, and so on. These approaches rely heavily on numerical measures and disregard the deep structure underlying trust. By contrast, we establish the idea of trust among agents b...

In open multi-agent systems trust models are an important tool for agents to achieve effective interactions. However, in these kinds of open systems, the agents do not necessarily use the same, or even similar, trust models, leading to semantic differences between trust evaluations in the different agents. Hence, to successfully use communicated trust evaluations, the agents need to align their...

Trust networks are directed weighted graphs whose nodes represent agents and edges represent trust between agents. This paper proposes a trust-based recommendation approach, which can recommend trustworthy agents to a requester in a trust network. We consider a good recommendation as one to an agent that the requester’s trusted neighbors trust highly. We relate the recommendation problem to the...

In this paper, we show that mobile code technology may prove to be a useful tool in advanced cryptographic protocols for secure distributed computing. Secure distributed computing addresses the problem of performing a computation with a number of mutually distrustful participants, in such a way that each of the participants has only limited access to the information needed for doing the computa...

Trust and reputation are vital concepts in multiagent systems where diverse, self-interested agents interact in pursuit of their own goals. While much work to date has focussed on enabling agents to form beliefs about the trustworthiness of potential delegation partners, the problem of deciding to trust on the basis of such beliefs has received relatively little attention. Without a model of tr...

Ad-hoc collaboration is a newly emerged environment enabling distributed collaborators to share resources. The dynamic nature and unique sharing pattern in ad-hoc collaboration poses great challenges for security services to accommodate both access control and trust management requirements in providing controlled resource sharing. In this paper, we propose a comprehensive, integrated and implem...

Autonomous agents require trust and reputation concepts in order to identify communities of agents with which to interact reliably in ways analogous to humans. Agent societies are invariably heterogeneous, with multiple decision making policies and actions governing their behaviour. Through the introduction of naive agents, this paper shows empirically that while learning agents can identify ma...