1*62c56f98SSadaf Ebrahimi /** 2*62c56f98SSadaf Ebrahimi * \file doc_rng.h 3*62c56f98SSadaf Ebrahimi * 4*62c56f98SSadaf Ebrahimi * \brief Random number generator (RNG) module documentation file. 5*62c56f98SSadaf Ebrahimi */ 6*62c56f98SSadaf Ebrahimi /* 7*62c56f98SSadaf Ebrahimi * 8*62c56f98SSadaf Ebrahimi * Copyright The Mbed TLS Contributors 9*62c56f98SSadaf Ebrahimi * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later 10*62c56f98SSadaf Ebrahimi */ 11*62c56f98SSadaf Ebrahimi 12*62c56f98SSadaf Ebrahimi /** 13*62c56f98SSadaf Ebrahimi * @addtogroup rng_module Random number generator (RNG) module 14*62c56f98SSadaf Ebrahimi * 15*62c56f98SSadaf Ebrahimi * The Random number generator (RNG) module provides random number 16*62c56f98SSadaf Ebrahimi * generation, see \c mbedtls_ctr_drbg_random(). 17*62c56f98SSadaf Ebrahimi * 18*62c56f98SSadaf Ebrahimi * The block-cipher counter-mode based deterministic random 19*62c56f98SSadaf Ebrahimi * bit generator (CTR_DBRG) as specified in NIST SP800-90. It needs an external 20*62c56f98SSadaf Ebrahimi * source of entropy. For these purposes \c mbedtls_entropy_func() can be used. 21*62c56f98SSadaf Ebrahimi * This is an implementation based on a simple entropy accumulator design. 22*62c56f98SSadaf Ebrahimi * 23*62c56f98SSadaf Ebrahimi * Meaning that there seems to be no practical algorithm that can guess 24*62c56f98SSadaf Ebrahimi * the next bit with a probability larger than 1/2 in an output sequence. 25*62c56f98SSadaf Ebrahimi * 26*62c56f98SSadaf Ebrahimi * This module can be used to generate random numbers. 27*62c56f98SSadaf Ebrahimi */ 28