@misc{1195176,
  author = {E B Barker},
  title = {Recommendation for obtaining assurances for digital signature applications:},
  year = {2006},
  month = {2006-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.SP.800-89},
  language = {en},
}