@ARTICLE{5765928, author={Wang, Cong and Wang, Qian and Ren, Kui and Cao, Ning and Lou, Wenjing}, journal={IEEE Transactions on Services Computing}, title={Toward Secure and Dependable Storage Services in Cloud Computing}, year={2012}, volume={5}, number={2}, pages={220-232}, doi={10.1109/TSC.2011.24}}