topic Re: ntag424 dna in NFC

ntag424 dna

zahra2023 — Mon, 28 Aug 2023 14:13:31 GMT

Hello, I urgently need the security and non-copyability of ntag424 dna. I want to know how we can write securely on these types of tags. Does the nfc tagWriter by nxp app guarantee this? and how ? Is there a way to avoid using the nfc tagWriter by nxp app but have the same security?

Re: ntag424 dna

zahra2023 — Mon, 28 Aug 2023 14:41:09 GMT

we wanna develop our app tag writer. is it possible ?

P.S: in our project there are 2 groups: 1) tag writers and 2) tag readers.

Re: ntag424 dna

KaiLi — Tue, 29 Aug 2023 04:40:28 GMT

Hello @zahra2023

Thanks for contacting us and using the NXP products.

Yes, there is a tool can be helpful to you. But it's available under an NDA, if you've already had an active NDA, you can log in RFIDDiscover | NXP Semiconductors to download the following documents.

kelly

Re: ntag424 dna

authways — Tue, 29 Aug 2023 07:14:15 GMT

@zahra2023 If you want to develop your own app, these PDFs will be your bible: NT4H2421Gx and AN12196.

Re: ntag424 dna

zahra2023 — Tue, 29 Aug 2023 07:37:26 GMT

unfortunately, we don’t have such a contract. If I use tagWriter nxp, where should I set the keys to have a secure tag? I saw tagXplorer (old desktop version) and there we can set some keys, but on tagWriter nxp I have not seen such configs! Should the tags support PICC to have a secure tag? We have some ntag424 dna, but apparently they don’t support PICC..

P.S.: I attached 2 files.

I appreciate it in advance.

Re: ntag424 dna

zahra2023 — Tue, 29 Aug 2023 11:06:29 GMT

Except for the documentation, do you have another source? GitHub repo or sample code?

Thanks

Re: ntag424 dna

KaiLi — Tue, 29 Aug 2023 11:28:31 GMT

Hello @zahra2023

The feature of tagWriter is limited, according to your application requirements must use RFID Discover. So, please establish an NDA with NXP by going to

https://www.nxp.com/support/support:SUPPORTHOME and select "Request an NDA"

kelly

Re: ntag424 dna

KaiLi — Wed, 30 Aug 2023 02:04:33 GMT

Hello @zahra2023

Yes, it's possible. And here are some suggestions for you as follows:

1. Please read the application document carefully, which describes in detail how to develop NTAG424: NTAG 424 DNA and NTAG 424 DNA TagTamper features and hints (nxp.com).

2. Please log in EdgeVerse™ NFC Readers | NXP Semiconductors and select a reader that matches your application.

3. RFID Discover Tool is a full-featured development and debugging tool, it is recommended that you use it.

kelly

Re: ntag424 dna

zahra2023 — Wed, 30 Aug 2023 06:01:08 GMT

and what about this question: Should the tags support PICC to have a secure tag (Secure Unique Nfc message feature)? We have some ntag424 dna, but apparently they don’t support PICC.

I attached two files. They are the tag’s info.

Thanks

Re: ntag424 dna

zahra2023 — Wed, 30 Aug 2023 07:36:14 GMT

Is RFID Discover Tool the only thing we need? Do you have any documentation or a built-in API service for checking authenticated tags over the server? I am curious about the security and how UID, SUN, etc. make the tag secure, but the tagWriter nxp does not satisfy me (at least the current version). Can you assure me that using RFID Discover Tool is a good suggestion?

Thanks

Re: ntag424 dna

KaiLi — Tue, 05 Sep 2023 03:28:27 GMT

Hello @zahra2023

Yes, RFID Discover (full version) can do these and we use it all the time.

In addition, if the Reader that you're using is from NXP, please refer to this example (Examples\NfcrdlibEx3_NFCForum) could be helpful to you.

kelly

Re: ntag424 dna

RishavKaaraTech — Fri, 05 Sep 2025 09:55:38 GMT

I have RFID Discover tool but to use it now we need a PEGODA Reader by NXP which I don't have. I am using DENSO and KEONN mainly to scan NFCs.

So how can RFIDDiscover help me in development of secure NFC reader. Right now I am stuck at SDM as it is not allowing me to configure the file of NTAG424 DNA tag.