@ARTICLE{6567860, author={Chen, Xiaofeng and Li, Jin and Ma, Jianfeng and Tang, Qiang and Lou, Wenjing}, journal={IEEE Transactions on Parallel and Distributed Systems}, title={New Algorithms for Secure Outsourcing of Modular Exponentiations}, year={2014}, volume={25}, number={9}, pages={2386-2396}, doi={10.1109/TPDS.2013.180}}