On 04.06.20 14:52, Michael Walle wrote:
Am 2020-06-04 14:26, schrieb Heinrich Schuchardt:
On 04.06.20 10:05, Horia Geantă wrote:
On 6/4/2020 5:31 AM, Heinrich Schuchardt wrote:
From what I see, driver added by Michael is using the PRNG / DRBG and not the TRNG. Is this acceptable?
If it is only PRNG, this is not what we look for. If a PRNG/DRBG is used to ameliorate the raw entropy stream like Linux does for the /dev/random device this is fine. We need something non-deterministic.
What do you mean by "only PRNG"?
-a PRNG / DRBG (SP800-90A compliant DRBG_Hash) - which is seeded from the TRNG
So while it is a PRNG, it is non-deterministic because its seeded from the TRNG.
If for every byte that your DM_RNG driver outputs at least one byte from the TRNG is consumed, it is fine. Otherwise it is not what we are looking for.
Best regards
Heinrich