Random number generator (RNG) module

The Random number generator (RNG) module provides random number generation, see ctr_dbrg_random() or havege_random(). More...

The Random number generator (RNG) module provides random number generation, see ctr_dbrg_random() or havege_random().

The former uses the block-cipher counter-mode based deterministic random bit generator (CTR_DBRG) as specified in NIST SP800-90. It needs an external source of entropy. For these purposes entropy_func() can be used. This is an implementation based on a simple entropy accumulator design.

The latter random number generator uses the HAVEGE (HArdware Volatile Entropy Gathering and Expansion) software heuristic which is claimed to be an unpredictable or empirically strong* random number generation.

• Meaning that there seems to be no practical algorithm that can guess the next bit with a probability larger than 1/2 in an output sequence.

This module can be used to generate random numbers.