@inproceedings{Piper82,
  title = {Stream Ciphers},
  author = {Fred Piper},
  year = {1982},
  url = {http://link.springer.de/link/service/series/0558/bibs/0149/01490181.htm},
  researchr = {https://researchr.org/publication/Piper82},
  cites = {0},
  citedby = {0},
  pages = {181-188},
  booktitle = {EUROCRYPT},
}