| /** |
| * @file |
| * Random number generator (RNG) module documentation file. |
| * |
| * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved |
| * |
| * This file is part of mbed TLS (https://tls.mbed.org) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| |
| /** |
| * @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 mbedtls_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. |
| */ |
