Please reference the following conference paper in addition to the technical report:

@InProceedings{nymble-pet07,
  author = {Peter C. Johnson and Apu Kapadia and Patrick P. Tsang and Sean W. Smith},
  title = "{Nymble: Anonymous {IP}-Address Blocking}",
  booktitle = {Proceedings of The Seventh International Symposium on Privacy Enhancing Technologies ({PET}), Ottawa, Canada},
  year = {2007},
  month = jun,
  pages = {113--133},
  series = {LNCS},
  volume = {4776},
  doi = {10.1007/978-3-540-75551-7_8},
  publisher = {Springer-Verlag},
  copyright = {Springer-Verlag}

}

@TECHREPORT{nymble-tr,
  author = {Patrick P. Tsang and Apu Kapadia and Cory Cornelius and Sean W. Smith},
  title = "{Nymble: Blocking Misbehaving Users in Anonymizing Networks}",
  institution = {Dartmouth College},
  year = {2008},
  number = {TR2008-637},
  month = dec,
  note = {This Technical Report is a significant rewrite of the Nymble System's construction. It includes new security modeling, proof sketches, and reports on the performance of our new open-source implementation.},
}