@misc{29056,
  author = {David Kuhn and Thomas Walsh and S Fries},
  title = {Security Considerations for Voice Over IP Systems},
  year = {2005},
  month = {2005-01-01},
  publisher = {Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=150222},
  language = {en},
}