@inproceedings{backes03reactively,
  author       = {Backes, Michael and Pfitzmann, Birgit and Waidner, Michael},
  title        = {Reactively Secure Signature Schemes},
  booktitle    = {Proceedings of 6th Information Security Conference (ISC)},
  series       = {Lecture Notes in Computer Science},
  volume       = {2851},
  month        = {October},
  year         = {2003},
  publisher    = {Springer},
  pages        = {84-95}
}