[cryptography] Intel RNG
jon at callas.org
Tue Jun 19 02:36:20 EDT 2012
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On Jun 18, 2012, at 4:12 PM, Marsh Ray wrote:
> 150 clocks (Intel's figure) implies 18.75 clocks per byte.
That's not bad at all. It's in the neighborhood of what I remember my DRBG running at with AES-NI. Faster, but not by a lot. However, I will getting the full 16 bytes out of the AES operation and RDRAND is doing 64 bits at a time, right?
> Note that Skein 512 in pure software costs only about 6.25 clocks per byte. Three times faster! If RDRAND were entered in the SHA-3 contest, it would rank in the bottom third of the remaining contestants.
As much as it warms my heart to hear you say that, it's not a fair comparison. A DRBG has to do a lot of other stuff, too. The DRBG is an interesting beast and a subject of a whole different conversation.
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