It was <2020-05-20 śro 08:23>, when Stephan Mueller wrote: > Am Dienstag, 19. Mai 2020, 23:25:51 CEST schrieb Łukasz Stelmach: > >> The value was estimaded with ea_iid[1] using on 10485760 bytes read from >> the RNG via /dev/hwrng. The min-entropy value calculated using the most >> common value estimate (NIST SP 800-90P[2], section 6.3.1) was 7.964464. > > I am sorry, but I think I did not make myself clear: testing random numbers > post-processing with the statistical tools does NOT give any idea about the > entropy rate. Thus, all that was calculated is the proper implementation of > the post-processing operation and not the actual noise source. > > What needs to happen is that we need access to raw, unconditioned data from > the noise source that is analyzed with the statistical methods. I did understand you and I assure you the data I tested were obtained directly from RNGs. As I pointed before[1], that is how /dev/hwrng works[2]. If I am wrong, do show me the code that processes the data from a HW RNG before copying them to user provided buffer[3]. [1] https://lkml.org/lkml/2020/5/15/252 [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/admin-guide/hw_random.rst?h=v5.6 [3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/char/hw_random/core.c?h=v5.6#n251 Kind regards, -- Łukasz Stelmach Samsung R&D Institute Poland Samsung Electronics
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