On Tue, 20 Dec 2016 18:44:08 -0800, Kevin Neilson wrote:
> Has anybody tried to build a true random number generator from Catalin
> Baetoniu's paper?
> He uses interconnected ring oscillators in conjunction with a "Linear
> Hybrid Cellular Automata" for making the distribution more uniform.
> I built this in a Virtex 7 to use in the lab for hardware testing. I
> had to instantiate the LUTs for the ring oscillator and put DONT_TOUCHes
> on them.
> I just wondered if anyone else had tried this. It's difficult to tell
> "how random" the numbers really are without extensive analysis. I
> noticed Xilinx has a patent based on this paper, but I didn't know you
> could patent ring oscillators.
Ring oscillators to generate -- or at least seed -- random numbers isn't
new. If there's a patent there, they're probably trying to make a real
or perceived barrier to people doing it with an Altera part.
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