This gem implements cryptographically secure deterministic random bit generators for Ruby. Currently, the gem supports HMAC_DRBG as described in NIST SP 800-90A.

This library should not be considered cryptographically secure. If you are looking for a generic Ruby CSRPNG, this is probably not what you are looking for. Instead, use SecureRandom. Only use this library if you absolutely need a random number generator that is explicitly seedable. If you don't know what this means, do not use this library.

gem install drbg-rb

require 'drbg-rb'

rng = DRBG::HMAC.new(entropy)
bytes = rng.generate(10)

• NIST SP 800-90 - Deterministic Random Bit Generator Validation System

This program is released under the BSD license.