|  | /** | 
|  | * @file | 
|  | * Random number generator (RNG) module documentation file. | 
|  | */ | 
|  |  | 
|  | /** | 
|  | * @addtogroup rng_module Random number generator (RNG) module | 
|  | * | 
|  | * The Random number generator (RNG) module provides random number | 
|  | * generation, see \c ctr_dbrg_random(). | 
|  | * | 
|  | * 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 \c entropy_func() can be used. This is | 
|  | * an implementation based on a simple entropy accumulator design. | 
|  | * | 
|  | * The other number generator that is included is less strong and uses the HAVEGE | 
|  | * (HArdware Volatile Entropy Gathering and Expansion) software heuristic | 
|  | * which considered unsafe for primary usage, but provides additional random | 
|  | * to the entropy pool if enables. | 
|  | * | 
|  | * \* 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. | 
|  | */ |