NTAG 424 NDEF pattern

MPucci — Tue, 15 Oct 2024 14:41:31 GMT

Hi,

i'm close to release my secure product but there is something still to fix: using different tools i can still read the ndef pattern. I mean i can see where starts the PICC, how is long, where start EncData ecc. ecc. I tried to hide it but the result is that the tag doesn't work anymore and i think is because the smartphone don't know how to build the ndef. Is there a way to completely hide tag info? The tag is closed, no one, even me, are able to write on it but i prefer to hide everything.

Thanks

Re: NTAG 424 NDEF pattern

EduardoZamora — Wed, 16 Oct 2024 00:23:54 GMT

Hello @MPucci

Hope you are doing well.

NTAG 424 allows the user to change the access rights configuration; file data can be accesses with 3 different access rights: Read, Write and ReadWrite. Write and ReadWrite access rights for the NDEF File (File No. 02h) should be changed after personalization in order to prevent unauthorized changes in the NDEF File.

Please refer to NTAG 424 Data Sheet, Section 8.2.3 Files for more information on File access rights management; and NTAG 424 DNA and NTAG 424 DNA TagTamper features and hints, Chapter 6 for an example of personalization.

Regards,
Eduardo.

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NTAG 424 NDEF pattern

Re: NTAG 424 NDEF pattern