@inproceedings{backes04low,
  author       = {Backes, Michael and Pfitzmann, Birgit and Waidner, Michael},
  title        = {Low-level Ideal Signatures and General Integrity Idealization},
  booktitle    = {Proceedings of 7th Information Security Conference (ISC)},
  series       = {Lecture Notes in Computer Science},
  volume       = {3225},
  month        = {September},
  year         = {2004},
  publisher    = {Springer},
  pages        = {39-51}
}