@article{zhu2012cooperative, title={Cooperative provable data possession for integrity verification in multicloud storage}, author={Zhu, Yan and Hu, Hongxin and Ahn, Gail-Joon and Yu, Mengyang}, journal={Parallel and Distributed Systems, IEEE Transactions on}, volume={23}, number={12}, pages={2231--2244}, year={2012}, publisher={IEEE} }