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#1 2019-09-12 02:23:23

hayabusa
Contributor
From: Australia
Registered: 2019-08-27
Posts: 3

Strange Mifare classic 4K tag

Hi all,

I have a problem with Mifare classic 4k tag(Not a dual chip)

I found all keys Sector 0 to 39 and able to read all blocks and copy to another.
However, when I copy to another tag(Gen2 4K card), it wont work as original tag(I mean no working at all to the reader)
Ive checked all the blocks, compared between original and copied tags, and all data are exactly same....

Did I miss something important that must be involved?
Please give me some hints......
(Im using PM3 Rdv4)

Thanks!!!

Last edited by hayabusa (2019-09-12 02:54:00)

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#2 2019-09-12 07:54:01

piwi
Contributor
Registered: 2013-06-04
Posts: 642

Re: Strange Mifare classic 4K tag

The reader may test for magic cards. Try to snoop the communication to find out.

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#3 2019-09-12 12:04:30

hayabusa
Contributor
From: Australia
Registered: 2019-08-27
Posts: 3

Re: Strange Mifare classic 4K tag

Thanks for your reply smile
I should have....
Will update with snoop!

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