[cryptography] urandom vs random

Peter Gutmann pgut001 at cs.auckland.ac.nz
Mon Aug 19 20:46:42 EDT 2013

shawn wilson <ag4ve.us at gmail.com> writes:

>It's not like they're the only ones that sell these, but they /were/ the only
>ones to sell USB PRNG at <$800.

You can get them for as little as $50 in the form of USB-key media players
running Android.  Or if you really insist on doing the whole thing yourself,
get something like an EA-XPR-003 ($29 in single-unit quantities from Digikey,
http://www.digikey.com/product-detail/en/EA-XPR-003/EA-XPR-003-ND/2410099) and
solder on a zener diode and a few I2C environmental sensors for
noise/unpredictability generation.

I don't see what the point is though, given that there's more than enough
noisy data available on a general-purpose PC.


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