Am Thu, May 12, 2022 at 01:47:06PM +0200 schrieb Jason A. Donenfeld: > But on the other hand, it appears that none of us really thinks that > premature next is a real problem worth complicating designs over. So > maybe we can just say that it is nice when the silicon in one way or > another helps with premature next, but maybe not an explicit must have. > So where does that leave us? > > - Systems with RDSEED/RDRAND don't have premature next, due to the above > KDF salt. This is probably the majority of systems out there these > days. This also applies to the sleep resumption notification (and the > vmgenid one), and I suspect that most systems with S3 or S0ix or > whatever else these days also probably have RDRAND. ... and most of these systems have TPM chips with a RNG, which is (alas) usually only used at system startup, as that hw_rng device sets its quality to 0 (meaning untrusted). So there's also room for improvement involving these hw rng devices. Thanks, Dominik
