KW41Z Random Number Generation

nick002025 — Tue, 17 Apr 2018 12:50:04 GMT

I am using the KW41Z with the 802.15.4 library and NXP framework. I am finding multiple random number generation functions in the provided code but I have not seen documentation or comments that describe the differences.

In SecLib, there is SecLib_get_random() which returns a 32 bit number.

uint32_t SecLib_get_random(void)

In RNG framework there are three functions:

RNG_HwGetRandomNo: uses TRNG_GetRandomData, which is hardware

RNG_GetRandomNo: uses SecLib_get_random

RNG_GetPseudoRandomNo: pseudo random number generation

What is the difference between SecLib_get_random and RNG_HwGetRandomNo? Does SecLib_get_random use hardware or is it is secure pseudo number generator?

Re: KW41Z Random Number Generation

stephanie_m — Tue, 24 Apr 2018 16:54:35 GMT

Hello,

TRNG

True Random Number Generator. See Chapter 43 from RM and TRNG_GetRandomData() from fsl_trng.c

RNG

Software-based secure pseudo number generator that uses the seed from the TRNG (See RNG_Init ).

Regards,

Estephania

topic Re: KW41Z Random Number Generation in Wireless MCU

KW41Z Random Number Generation

Re: KW41Z Random Number Generation