@misc{7491,
  author = {Institute Computer},
  title = {DES Modes of Operation [includes Change Notice of May 31, 1996]},
  year = {1980},
  month = {1980-12-02},
  publisher = {Federal Inf. Process. Stds. (NIST FIPS), National Institute of Standards and Technology, Gaithersburg, MD},
  language = {en},
}