@misc{262681, author = {Ronald Ross and Victoria Pillitteri and Kelley Dempsey and Mark Riddle and Gary Guissanie}, title = {Protecting Controlled Unclassified Information in Nonfederal Systems and Organizations [including updates as of 01-28-2021]}, year = {2021}, month = {2021-01-28}, publisher = {Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NIST.SP.800-171r2 }, language = {en}, }