TY - GEN AU - Jansen, Wayne C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2009-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.7564 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2009 TI - Directions in security metrics research: ER -