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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights − Developing algorithms transforming model checking RTCTLcc into model checking RTCTL − Implementing a transformation toolkit engine with user interface on top of NuSMV − Proving the soundness of the transformation technique − Analyzing the time and space computational complexity of the RTCTLcc model checking

We present a formal framework that allows individual and group of agents to reason about their trust toward other agents. In particular, we propose a branching time temporal logic BT which includes operators that express concepts such as everyone trust, distributed trust and propagated trust. We analyze the satisfiability and model checking problems of this logic using a reduction technique.

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