@article{hofheinz07universally,
  author       = {Hofheinz, Dennis and Unruh, Dominique and M\"{u}ller-Quade, J\"{o}rn},
  title        = {Universally Composable Zero-Knowledge Arguments and Commitments from Signature Cards},
  journal      = {Tatra Mt. Math. Pub.},
  booktitle    = {MORAVIACRYPT '05},
  year         = {2007},
  pages        = {93-103}
}