@ARTICLE{6642033, author={Li, Jin and Li, Jingwei and Chen, Xiaofeng and Jia, Chunfu and Lou, Wenjing}, journal={IEEE Transactions on Computers}, title={Identity-Based Encryption with Outsourced Revocation in Cloud Computing}, year={2015}, volume={64}, number={2}, pages={425-437}, doi={10.1109/TC.2013.208}}