@ARTICLE {28386, author={S. Roy and A. D. Das and S. Chatterjee and N. K. Kumar and S. Chattopadhyay and J. R. Rodrigues}, doi={10.1109/TII.2018.2824815}, journal={IEEE Transactions on Industrial Informatics}, title={Provably Secure Fine-Grained Data Access Control Over Multiple Cloud Servers in Mobile Cloud Computing Based Healthcare Applications}, year={2019}, month={January}, volume={15}, number={1}, pages={457-468}, ISSN={1551-3203} }