We consider cooperating intrusion detection agents that limit the cooperation information flow with a focus on privacy and confidentiality. Generalizing our previous work on privacy respecting intrusion detection for centralized systems we propose an extended functional model for information reductions that is used for cooperation between intrusion detection agents. The reductions have the foll...

The idea that cooperation can be a source of power has been extensively discussed in various disciplines. We study this idea from an economic viewpoint by analyzing the effect of intragroup cooperation in a static group rent-seeking model. Intragroup cooperation means that agents’ rent-seeking efforts maximize their group’s expected payoff. Although intragroup cooperation always reduces average...

This paper proposes the application of a new actor-based extension of Nelson's ZigZag model in humanities, in order to create graph-centric browsing tools for Electronic Editions of multidimensional documents. The combination of the ZigZag model and of cooperation activities of different actor classes allows our model to create innovative, graph-centric browsing perspectives for the user and to...

We study cooperation structures with the following property: Given any two feasible coalitions with non-empty intersection, its union is a feasible coalition again. These combinatorial structures have a direct relationship with graph communication situations and conference structures à la Myerson. Characterizations of the Myerson value in this context are provided using the concept of basis for...

COMAIDE is a toolkit for user-system cooperation through joint multi-focal graph browsing. It supports cooperative force-directed layout management, concurrent with dialogue handling, for heterogeneous multi-layered 3D interactive diagrams. The layout manager's intu-itively`natural' animations of multi-layered 3D graph drawings support: 1. Cooperative tidying of user-manipulable 3D layout; 2. O...