NIST is seeking public comment on its latest draft of a publication intended to help computer security experts use randomness to protect sensitive data. Second Draft of Special Publication (SP) 800-90B, Recommendation for the Entropy Sources Used for Random Bit Generation, aims to help security specialists judge whether source of random numbers they use as part of data encryption process is sufficiently unpredictable. NIST is requesting public comments by May 9, 2016.