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#1 2022-10-11 14:24:05

doadam
Contributor
Registered: 2022-10-04
Posts: 3

Advanced(?) low frequency tag detection with proxmark3

I'm trying to clone my office tag so that I could use it on other RFID compatible devices (ring, other cards, etc?)

I'm using proxmark3 RDV4 for that, and lf search finds nothing. the high frequency antenna detects no noise when I put the chip on the antenna, but the low frequency one does, so I assume it is a low freq one.

I'm attaching a picture of the tag, and also a dump from the antenna. Based on the patterns, it seems to be an FSK tag, but I'm not really experienced enough to know.

876b295b2965276c85ac14d6d5260f6c02b0df42.jpg

I would appreciate help with analyzing this, or even resources that could further help me understand would be great (just not the usual "have you tried 101 youtube videos?" because I already did).

Thanks a lot,

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#2 2022-10-11 17:55:48

iceman
Administrator
Registered: 2013-04-25
Posts: 9,486
Website

Re: Advanced(?) low frequency tag detection with proxmark3

It could be high frequency... 

Tried _hf search_  ?

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#3 2022-10-13 12:18:14

doadam
Contributor
Registered: 2022-10-04
Posts: 3

Re: Advanced(?) low frequency tag detection with proxmark3

Hi,

Of course. It didn't detect anything as well.

But in general, why would it be hf if putting the chip on the antenna with hf read shows no difference?

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