TY - GEN AU - M Swanson AU - N Bartol AU - J Sabato AU - J Hash AU - L Graffo C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2003-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.SP.800-55 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2003 TI - Security metrics guide for information technology systems: ER -