@misc{W1534388293,
  author = {Taher ElGamal},
  title = {A Public Key Cryptosystem and a Signature Scheme Based on Discrete Logarithms},
  year = {2007},
  howpublished = {Lecture notes in computer science},
  doi = {https://doi.org/10.1007/3-540-39568-7\_2}
}