[Cryptography] Photon beam splitters for "true" random number generation ?

Bill Cox waywardgeek at gmail.com
Thu Dec 17 12:30:22 EST 2015

On Wed, Dec 16, 2015 at 2:16 AM, Bertrand Mollinier Toublet <
crypto-metzdowd at bmt-online.org> wrote:

> Stephen, since you’re bringing it up: I’d like to hear a few opinions from
> the group on that H/W TRNG from WaywardGeek, the one made by hand (
> https://www.tindie.com/products/WaywardGeek/infinite-noise/). My cynical
> gut feeling fires up all kinds of flashing red lights, but I might be
> missing something

It is possible no one replied because I am WaywardGeek, and I'm on this
thread.  That's too bad, because I would love to hear opinions on my TRNG,
especially negative ones.  I'd love to hear about the flashing red lights
:)  Don't worry, I have thick skin and take negative feedback well.

There are some negatives that I know about.  In particular, no EMI
shielding means a nearby radio might determine the 0's and 1's from the
device.  One user concerned about this wrapped it with aluminum foil, and
used the extra shrink-wrap over the tin-foil, but I like to see the board
and choose to live with the EMI risk.  Another issue is the architecture is
new, and not time-proven.  For stronger protection, consider the OneRNG.
It is my current favorite for production needs.  I actually carry this one
in my pocket, so I prefer its smaller form factor.  However, only a
ridiculous geek would carry one of these in their pockets :)

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