@INPROCEEDINGS{paper-ssn2007,
  author = {R. Mayrhofer and H. Gellersen},
  title = {On the Security of Ultrasound as Out-of-band Channel},
  booktitle = {Proc. {IPDPS 2007}: 21st {IEEE} International Parallel and Distributed Processing Symposium},
  day = {26--30},
  month = {March},
  year = {2007},
  publisher = {IEEE CS Press},
  pages = {321},
  isbn = {1-4244-0909-8},
  location = {Long Beach, California, USA},
  note = {Track {SSN 2007}: 3rd International Workshop on Security in Systems and Networks},
  documenturl = {http://www.mayrhofer.eu.org/downloads/publications/SSN2007-Ultrasound-Security-Analysis.pdf}
}