TY - GEN AU - M C Tracy AU - W Jansen AU - K A Scarfone AU - J Butterfield C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2007-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.SP.800-45ver2 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2007 TI - Guidelines on electronic mail security: ER -