@article{dh76,
  title={{New Directions in Cryptography}},
  author={Whitfield Diffie and Martin Hellman},
  journal={IEEE Transactions on Information Theory},
  volume={22},
  number={6},
  pages={644--654},
  year={1976}
}

@book{kl07,
 author = {Katz, Jonathan and Lindell, Yehuda},
 title = {Introduction to Modern Cryptography (Chapman \& Hall/Crc Cryptography and Network Security Series)},
 year = {2007},
 isbn = {1584885513},
 publisher = {Chapman \& Hall/CRC},
}