TY - GEN AU - E B Barker C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2006-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.SP.800-89 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2006 TI - Recommendation for obtaining assurances for digital signature applications: ER -