NIST SP 800-22: Download Documentation and Software April 27, 2010: NIST SP 800-22rev1a (dated April 2010), A Statistical Test Suite for the Validation of Random Number Generators and Pseudo Random Number Generators for Cryptographic Applications, that describes the test suite. Download the NIST Statistical Test Suite. July 9, 2014: This update has a few minor corrections to the source code. The f