TY - GEN AU - L Chen C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2011-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.SP.800-56c LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2011 TI - Recommendation for key derivation through extraction-then-expansion: ER -