Collaborative systems are growing in use and popularity. The need to boost the methods concerning the interoperability is growing as well; therefore, trustworthy interactions of the different systems are a priority. The decision regarding with whom and how to interact with other users or applications depends on each system. We focus on providing trust verdicts by evaluating the behaviors of different agents, using distributed online network monitoring. This will provide trust management systems

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... information regarding a trustee experience, for those trust management systems based on "soft trust". In this work, we propose a scalable evaluation method for any on-line network monitoring system, by using an auxiliary model, an extended finite state automaton (EFSA), and as well as other known methods to reduce the time complexity of the evaluation algorithm.