Date Published: January 2012 
            
            
            
            
            
            
            Withdrawn: June 24, 2015 
			
			
            
            
            
            
            Superseded By: SP  800-90A Rev. 1 (June 2015)
            
            
            Supersedes: SP  800-90 Revised (March 2007)
            
            
			
            
            Author(s)
            Elaine Barker (NIST), John Kelsey (NIST)
            
            
            
            
            
                
                
                    This Recommendation specifies mechanisms for the generation of random bits using deterministic methods. The methods provided are based on either hash functions, block cipher algorithms or number theoretic problems.
                 
                
                    
                        This Recommendation specifies mechanisms for the generation of random bits using deterministic methods. The methods provided are based on either hash functions, block cipher algorithms or number theoretic problems.
                    
                 
                Keywords
 deterministic random bit generator (DRBG); entropy; hash function; random number generator
            
 
            
            Control Families
            
                
                
                    System and Communications Protection;