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#1 2019-03-27 21:45:26

dceliano
Contributor
Registered: 2018-04-23
Posts: 4

Overclocking Mifare Cards

I did some work using the Proxmark 3 last year overclocking the Mifare Plus and Mifare DESFire. I got them to operate at carrier frequencies over 20% higher than 13.56 MHz. Overclocking can be used to conduct relay attacks at a larger distance and bypass the Mifare distance-bounding protocol. A link to my full thesis/report is below. Please let me know if you have any questions/comments or need help working with either of these cards.

https://domcc3.com/assets/pdfs/Celiano_ … checks.pdf

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#2 2019-03-27 21:58:24

iceman
Administrator
Registered: 2013-04-25
Posts: 9,497
Website

Re: Overclocking Mifare Cards

[moved]

Cool concept,  tell us more about it.

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#3 2019-03-27 22:09:23

iceman
Administrator
Registered: 2013-04-25
Posts: 9,497
Website

Re: Overclocking Mifare Cards

And your github account?  I am very curious of your implementation!

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#4 2019-03-27 22:17:25

dceliano
Contributor
Registered: 2018-04-23
Posts: 4

Re: Overclocking Mifare Cards

The code I used is on Github here (on my mainwork branch): https://github.com/dceliano/proxmark3/tree/mainwork

Not sure what else you want to know, but I do have some tidbits about messing with the PM3.

To use a different clock signal, I had to change around the FPGA code and regenerate the bitfile. It was kind of a pain to get this working with the Xilinx software, but I was eventually able to do it by debugging and looking around the forums. It was also a little bit of a learning curve to get going with the Lua scripts, but once I learned how the API worked it was an easy way to write/read raw data to/from the Mifare cards.

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#5 2019-03-27 22:25:45

iceman
Administrator
Registered: 2013-04-25
Posts: 9,497
Website

Re: Overclocking Mifare Cards

Well,  I am looking for your lua scripts among things smile  Need to add them to my fork, bro! 
Getting the fpga to compile was a pain.  I got help to sort it out.

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