[guardian-dev] Lavabit and End-point Security

[coderman]

On Mon, Aug 12, 2013 at 6:33 AM, Nathan of Guardian
<nathan at guardianproject.info> wrote:
> ...
> On your last point (SDR-as-debug/detect-tool), would Tom Riiter's recent
> work with using picocell's be helpful in that context?


the picocell won't provide the level of access you need to view what's
happening. what you want is the equivalent of monitor mode for cell
bands... #include <std_legal_disclaimer.h>

hardware i've used which works well: Noctar (formely Phi) from
Pervices, USRP2, and others have indicated good success with BladeRF
units. there are plenty of other SDRs out there but i don't know
enough to comment.  i have tried multiple rtl-sdr USB in parallel but
was not able to make it useable for most any of cdma, edge, ehrpd,
evdo, evdoa, evdob, hsdpa, hspa, hspap, hsupa, iden, or lte encodings
in the limited amount of time spent on the effort.


that said, hacking the picocell in a way that makes it resistant to
such attacks, and forcing devices to it instead could provide a
deterrent and visibility. this seems like a stop gap at best, but
perhaps still useful in a pinch!


"Noctar Kit"
http://www.pervices.com/shop/index.php?route=product/product&product_id=49

"BladeRF"
http://nuand.com/

you know where to find USRP2s :)