@article{ren2009multi,
  title={Multi-user broadcast authentication in wireless sensor networks},
  author={Ren, Kui and Yu, Shucheng and Lou, Wenjing and Zhang, Yanchao},
  journal={IEEE Transactions on Vehicular Technology},
  volume={58},
  number={8},
  pages={4554--4564},
  year={2009},
  publisher={IEEE}
}