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Server Time:
2024-05-11 12:03:06
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 Explorer Zero
     
 |  |  | card access hackers wanted
< on 11/1/2005 6:55 PM >
|  | | | the thread on magnetic stripe cards has prompted me to come forward with this thought thats been bugging me and I know there are many types of card access systems. one of the more common (and seemingly vulnerable) is a passive circuit that responds to a minute little RF signal emanating from the pad. sometimes these are called transponders. has anyone hacked these or come up with a way to defeat one? I took a card apart once it looked a lot like the anti-theft tags at department stores just a printed copper trace "tuned" circuit.
my theory is untested and not really researched much so feel free to shoot holes all in it. but couldnt one use a simple frequency counter to obtain the precise signal and use a MW transmitter to send a signal to the reader? anyone know what band these work in or if the signal is modulated?
any techies out there want to chime in this would be like a universal pass around here so many places use these
oh yeah in Texas its a felony to possess a mag card reader but this is not a mag card and its not a reader
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Pleiades
Location: Halifax
Gender: Male
| | Re: card access hackers wanted
<Reply # 1 on 11/1/2005 7:20 PM >
| | | | I think this may be exactly what you are looking for: http://cq.cx/prox.pl even gives circuit diagrams
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Agent Skelly
     
Web Sheriff
Location: Oregon Territory
Gender: Male
Prenez De L'Avance Avec Chrysler!
| |  |  | | Re: card access hackers wanted
<Reply # 2 on 11/1/2005 9:30 PM >
| | | | What your describing is called a Proxmity Card.
Some of them out there are ISO 14443 a.k.a "Contactless Smart Card", which in that case, its a two-way communication.
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r0n22
Gender: Male
| | Re: card access hackers wanted
<Reply # 3 on 11/1/2005 9:36 PM >
| | | | From what i can remeber all it does is that it changes the freqences sent out by the reader and the reader picks up the new freqency. so theoritally you could use a anti theft tag but it would be very unlikely that it would work.
r0n22
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Explorer Zero
| | | Re: card access hackers wanted
<Reply # 4 on 11/1/2005 10:13 PM >
| | | | Posted by Pleiades
I think this may be exactly what you are looking for: http://cq.cx/prox.pl even gives circuit diagrams
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thats bloody awesome I knew it could be done that way Im just not smart enough to do it!
clone someones card right in their hip pocket no less, freaking awesome thanks for the link sir.
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Pleiades
Location: Halifax
Gender: Male
| | Re: card access hackers wanted
<Reply # 5 on 11/1/2005 10:48 PM >
| | | | You're welcome, are you gonna try build one?
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