A collaborative trust model of firewall-through based on Cloud Computing

In this paper, the existing trust models and firewall technology are studied. Then we develop an approach based on Cloud Computing to estimate dynamic context and present the definition of risk signal. A collaborative trust model of firewall-through based on Cloud Environment is proposed. The model has three advantages: Firstly, there are different security policies for different domains. Secondly, the model considers the transaction context, the historical data of entity influences and the measurement of trust value dynamically. Thirdly, the trust model is compatible with the firewall and does not break the firewall´s local control policies. To verify the reliability and effectiveness of the coordinated trust model, a simulation is carried out. The simulation result shows that this trust model is robust and out-performances traditional trust models based on domains because it successfully blocks malicious access under Cloud Computing environment.