TY - GEN AU - Annabelle Lee C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1999-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.SP.800-21 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1999 TI - Guideline for implementing cryptography in the federal government: ER -