Thanks Hans.  I read the article at the url you gave and found this link 
which has all the gory details.

http://www.cs.tau.ac.il/~tromer/acoustic/

On 12/18/2013 11:07 AM, der.hans wrote:
> moin moin,
>
> Modern safe-cracking, listening to decryption to discover the private
> key.
>
> http://lists.gnupg.org/pipermail/gnupg-devel/2013-December/028102.html
>
> ciao,
>
> der.hans

-- 
"I get my copy of the daily paper, look at the obituaries page, and if I’m not there, I carry on as usual."

Patrick Moore