A. Islam, M. Corney, G. Mohay, A. Clark, S. Bracher, R. Tobias, and U. Flegel. International Information Security Conference (SEC 2010) : Security and Privacy : Silver Linings in the Cloud, page 112--123. Brisbane Convention & Exhibition Centre, Brisbane, Queensland, Springer, (September 2010)Accepted papers will be presented at the conference and published in the IFIP AICT (Advances in Information and Communication Technology) Series by Springer..