[5296] in cryptography@c2.net mail archive
Re: depleting the random number generator -- repeated state
daemon@ATHENA.MIT.EDU (Eugene Leitl)
Sat Jul 31 17:06:33 1999
From: Eugene Leitl <eugene.leitl@lrz.uni-muenchen.de>
Date: Fri, 30 Jul 1999 16:00:48 -0700 (PDT)
To: David Honig <honig@sprynet.com>
Cc: Eugene Leitl <Eugene.Leitl@lrz.uni-muenchen.de>,
"Enzo Michelangeli" <em@who.net>, "bram" <bram@gawth.com>,
<cryptography@c2.net>
In-Reply-To: <3.0.5.32.19990730094112.008023f0@pop.sprynet.com>
David Honig writes:
> One of the many uses of nitric acid. Ie, take random samples
I thought this is mostly done by removing the bulk of the package
polymer by grinding, and then subjecting the rest of it to a plasma
etch.
I haven't put a processed wafer into nitric acid yet, but I could
imagine it does horrible things to small structures.
> apart and look at them. There are commercial places that
> will do the lab work for you.
Since this involved manual work and heavy apparatus (UHV plasma etch
chamber, EM, etc.) as well as know-how (finding a structure and
guessing what it does) it won't be exactly cheap.
