[Cryptography] Whitening Algorithm

Bill Cox waywardgeek at gmail.com
Thu Jul 23 21:20:36 EDT 2015

On Thu, Jul 23, 2015 at 2:48 PM, Krisztián Pintér <pinterkr at gmail.com>

> Rob Seward (at Thursday, July 23, 2015, 4:50:03 AM):
> > I’m trying to whiten a random noise source (a reverse biased
> > transistor) with a low-powered microprocessor.
> i know you want review of your algo, but instead i give an idea that
> might work for you.
> use a small cryptographic sponge in duplex mode, for example
> keccak[200, r=8] reduced to 6 rounds. this sponge instance has 96 bit
> security, and requires only 25 bytes of memory. this is a very safe
> solution, although of course a magnitude slower than yours, and also
> needs a fair bit of code.
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Not a bad solution.  I use 1600-bit Keccak to whiten the output of my
Infinite Noise TRNG.  Works great :-)

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