Free NIST 800 Protecting Controlled Unclassified Information in Nonfederal Systems and Organizations 2021-07-14

This publication is available free of charge from: https://doi.org/10.6028/NIST.SP.800-171r2 https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-171r2.pdf