TY - GEN AU - Paul A Grassi AU - Michael E Garcia AU - James L Fenton C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2017-06-01 04:06:00 DO - https://doi.org/10.6028/NIST.SP.800-63-3 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2017 TI - Digital identity guidelines: revision 3: ER -