The recent developments in cloud computing technology show an increase in security, privacy and trust related problems, in many ways, which haven't been predicted by the ones who have been designing clouding environments. Among them, the users trust problem and cloud computing resources secure access warranty have deserved special attention. Computing systems trust representation have been widely discussed and applied in a lot of information technology scenarios. This paper proposes the development trust model to ensure a reliable files exchange among users in a private cloud, as well as the calculation process of trust among these users, according to the metrics previously established.
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