@misc{1195431,
  author = {D R Kuhn and T J Walsh and S Fries},
  title = {Security considerations for Voice Over IP Systems:},
  year = {2005},
  month = {2005-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.SP.800-58},
  language = {en},
}