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SP 800-90C (Draft)

Recommendation for Random Bit Generator (RBG) Constructions

Date Published: August 2012
Comments Due: December 5, 2012 (public comment period is CLOSED)
Email Questions to: rbg_comments@nist.gov


Elaine Barker (NIST), John Kelsey (NIST)


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. SP 800-90B specifies the design principles and requirements for the entropy sources used by Random Bit Generators, and the tests for the validation of entropy sources. A list of questions relating to SP 800-90B is also provided for reviewers. 

SP 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 bit generator (NRBG). The constructed RBGs consist of DRBG mechanisms as specified SP 800-90A and entropy sources as specified in SP 800-90B.



deterministic random bit generator (DRBG); entropy; entropy source; nondeterministic random bit generator (NRBG); random number generator; source of entropy input
Control Families

System and Communications Protection


None available

Supplemental Material:
None available

Document History:
09/05/12: SP 800-90C (Draft)
04/13/16: SP 800-90C (Draft)
09/07/22: SP 800-90C (Draft)


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