NIST requests comments on two Draft publications for random bit generation: Draft SP 800-90B, Recommendation for the Entropy Sources Used for Random Bit Generation and Draft SP 800-90C, Recommendation for Random Bit Generator (RBG) Constructions. 
 
Draft Special Publication 800-90B specifies the design principles and requirements for the entropy sources used by Random Bit Generators, and thetests for the validation of entropy sources. A list of questions relating to SP 800-90B is also provided for reviewers. 
 
Draft Special Publication 800-90C specifies constructions for the implementation of random bit generators (RBGs). An RBG may be a deterministic random bit generator (DRBG) or a non-deterministic random bitgenerator (NRBG). The constructed RBGs consist of DRBG mechanisms as specified SP 800-90A and entropy sources as specified in SP 800-90B. SP 800-90A is available by searching the Publications database.

Please send comments to rbg_comments@nist.gov by December 5, 2012. For the comments on SP 800-90B, please put "Comments on Entropy Sources" in the subject line. For the comments on SP 800-90C, please put "Comments on RBG Constructions" in the subject line.