@article{chen2013new,
  title={New algorithms for secure outsourcing of modular exponentiations},
  author={Chen, Xiaofeng and Li, Jin and Ma, Jianfeng and Tang, Qiang and Lou, Wenjing},
  journal={IEEE Transactions on Parallel and Distributed Systems},
  volume={25},
  number={9},
  pages={2386--2396},
  year={2013},
  publisher={IEEE}
}