Ok thanks for advices Michael,

I will try to modify the mifare area of the Nexus in order to
reproduce my badge.

Best regards

Marcus



On Jun 11, 11:33 am, Michael Roland <mi.rol...@gmail.com> wrote:
> Hallo Marcus,
>
> > At time, I'm able to put my devices into emulation mode.
> > I'm getting ATR and UID throuth my OMNIKEY CardMan 5321 :
> >    - ATR: 3B 8A 80 01 00 31 C1 73 C8 40 00 00 90 00 90
>
> Correct, this is the ATR generated for the SmartMX.
>
> >    - The ID of the emulated card is constant even if i start a new
> > power cycle .
>
> Correct, the UID of the SmartMX is static (by default).
>
> > My question is how can I found my UID on the NXP chip ?
>
> What do you mean by "find"?
>
>  - Do you want to read the UID value from Android?
>
> This can be done through some hidden/internalNFCAPIs.
>
> > Can you give me more information about the 0xffffffffffff key? I don't
> > understant how to use it ...
>
> This is the authentication key to the MIFARE Classic area of the
> SmartMX. You can use this key to read & write data to the 4K MIFARE area
> on the SmartMX. You would use this key with your reader's MIFARE access
> methods (either reader specific or compliant to the PC/SC standard for
> access to contactless memory cards).
>
> With your Omnikey reader it will be quite difficult to use the MIFARE
> area as it automatically activates the SmartMX up to its highest
> protocol level (APDU-based access to the JavaCard). So the MIFARE
> protocol will not work on this activation level. (As far as I remember
> you might be able to disable the automatic protocol activation with some
> registry tweaks.)
>
> br,
> Michael

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