Advanced Attacks to Trusted Communities in Multi-agent Systems

Self-integration of system components is characterised by uncertain relations among these components. One approach to handle such uncertainties is to introduce technical trust. In previous work, we developed a concept to automatically build collections of components with stable trust relationships so-called Trusted Communities. In this paper, we discuss advanced attacks to the trusted communities and describe counter measures to deal with malicious elements. As application scenario, a Desktop Grid Computing system is used, since it mischaracterised by all those properties that become important when developing self-integrating systems: e.g. openness, heterogeneity and limited control over participating entities. The evaluation demonstrates that even advanced attacks can be recognised fast and successfully.