Hi Ted, On 10/04/2013 09:10 PM, Theodore Ts'o wrote: > On Fri, Oct 04, 2013 at 07:23:50PM +0300, Stanimir Varbanov wrote: >> I guess that it should follow NIST 800-90 recommendation, but I'm not >> aware what DRBG mechanism is used. >> >> To be honest I really don't know the hardware implementation details. I >> put PRNG abbreviation in the cover letter just because I saw that >> defines for register offsets are prefixed with PRNG_*. I could rename >> all occurrences of PRNG to RNG. Is that will be enough to avoid confusions? > > If that's what the Qualcomm documentation uses, maybe we should stick > with it, and add some explanatory comments. Is there any > documentation for this block that is public that you can either send > me a a pointer to? No, there is no public documentation for the block. Here is the driver documentation which I used as a base [1]. My guess was that - if it is PRNG (got from hardware description link above) than according to wiki [2] it is also known as a deterministic random bit generator (DRBG). The recommendation for RNG using DRBG is NIST 800-90. Of course I could be wrong, so I can add a comment that this is just a guess and we shouldn't over-reliance on this. regards, Stan [1] https://www.codeaurora.org/cgit/quic/la/kernel/msm/tree/Documentation/arm/msm/msm_rng-driver.txt?h=jb_3.2.1 [2] http://en.wikipedia.org/wiki/Pseudorandom_number_generator -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
