[Cryptography] The ultimate physical limits of privacy

[R. Hirschfeld]

> Date: Sat, 29 Mar 2014 01:09:42 +0100
> From: tpb-crypto at laposte.net

> > http://www.nature.com/nature/journal/v507/n7493/full/nature13132.html?WT.ec_id=NATURE-20140327

> Can you please elaborate on the paper's contents? At least the
> abstract?

I found a press release at

  http://www.eurekalert.org/pub_releases/2014-03/cfqt-ksi032414.php

that offers a bit more information.  Seems to be based on randomness
amplification.