full-disclosure - Sniffing RFID ID's ( Physical Security )

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Date: Tue Jun 27 06:31:21 2006
From: joshuaperrymon at gmail.com (Josh L. Perrymon)
Subject: Sniffing RFID ID's ( Physical Security )

My post was based more on *existing* RFID implementations used for physical
security access cards.

I know that non-contact cards such as RFID Credit Cards use encryption so
on...  But are still vulnerable to non-authorized transactions.. I'm mean..
there is no green button you push to authorize the transaction.

But I just don't believe that the RFID access-card I use to access client
premeises use any type of encryption or only communicate with specific
readers.

IF* this is the case then an attacker should have no problems powering the
card and making a "copy" of the contents.

JP
PacketFocus
www.packetfocus.com
josh.perrymon@...ketfocus.com

On 6/27/06, mikeiscool <michaelslists@...il.com> wrote:
>
> On 6/27/06, Valdis.Kletnieks@...edu <Valdis.Kletnieks@...edu> wrote:
> > On Tue, 27 Jun 2006 14:24:35 +1000, mikeiscool said:
> > > eh?
> > >
> > > surely a RFID would only communicate it's private token with a trusted
> > > (i.e. keyed) source.
> > >
> > > like a smartcard ...
> >
> > Well.. Yeah.  That *would* make sense.
> >
> > Unfortunately, some beancounter would likely realize they can shave
> $0.02 per
> > card by doing it the easy way, or that they can save $40K by hiring a
> > bonehead designer rather than a clued crypto geek.
> >
> > If all software was actually designed and implemented to the "Surely it
> would"
> > standard, most of the people on this list, both black and white hats,
> would
> > be unemployed.  Fortunately for our collective ability to cover our rent
> checks,
> > almost all software has "Surely they *didn't*" flaws in it....
>
> hang on,
>
> does that make me a clued crypto geek? i better ask for a raise ...
>
> but anyway; the op was asking for suggestions; my suggestion is to do
> what i said. if someone is trying to make rfids secure; why not follow
> the smartcard format?
>
> -- mic
>
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