@misc{hofheinz09polynomial,
  author       = {Hofheinz, Dennis and Unruh, Dominique and M\"{u}ller-Quade, J\"{o}rn},
  title        = {Polynomial Runtime and Composability},
  month        = {October},
  year         = {2009},
  note         = {Preprint on IACR ePrint 2009/023}
}