Secure cloud computing with brokered trusted sensor networks

We propose a model for large-scale smartphone based sensor networks, with sensor information processed by clouds and grids, with a mediation layer for processing, filtering and other mashups done via a brokering network. Final aggregate results are assumed to be sent to users through traditional cloud interfaces such as browsers. We conjecture that such a network configuration will have significant sensing applications, and perform some preliminary work in both defining the system, and considering threats to the system as a whole from different perspectives. We then discuss our current, initial approaches to solving three portions of the overall security architecture: i) Risk Analysis relating to the possession and environment of the smart-phone sensors, ii) New malware threats and defenses installed on the sensor network proper, and iii) An analysis of covert channels being used to circumvent encryption in the user/cloud interface.