Re: how i stopped worrying and loved the backdoor

[Dan Kaminsky <dan () doxpara com>]

Sent from my iPhone

On Dec 25, 2010, at 2:38 PM, BMF <badmotherfsckr () gmail com> wrote:

> On Sat, Dec 25, 2010 at 2:12 PM,  <cpolish () surewest net> wrote:
> > Check out Markus Jacobsson et al, "A Practical Secure Physical Random
> > Bit Generator", 1998, using the turbulence of airflow inside the drive
> > as the source of randomness. Can't do much better than that.
>
> I read that when it came out. I am quite familiar with turbulent
> boundary layers. Nobody sells hardware (hard drives, in this case)
> which actually implements the technique. All of my original queries
> still stand.

Making noisy diodes isn't all that hard, AFAIK. You eliminate bias by only returning difference bits -- 01 is a 0, 10 
is a 0. Whether the underlying silicon is in fact doing that...well, that's a question for the chip reversers. 

> BMF
>
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