@article{backes05reactively,
  author       = {Backes, Michael and Pfitzmann, Birgit and Waidner, Michael},
  title        = {Reactively Secure Signature Schemes},
  journal      = {International Journal of Information Security (IJIS)},
  volume       = {4},
  number       = {4},
  year         = {2005},
  pages        = {242-252}
}