implementation of ntag424 dna encryption and decryption

[zahra2023]

Hello ,

We are planning to start a very important and big project that involves financial transactions.

We want to use ntag424 dna , but we don’t want to use the tagWriter nxp app or the RFID discover tool, or any middleware app in general. We have two apps (writer and reader). The writer app is used by some limited people (because of confidentiality), but the reader app is for the public. If we develop our own apps for writing and reading on/from tags, can we use the documentation of ntag424 dna and create secure apps (writer and reader) that somehow use the UID and generate secure links (they must be non-copyable) with UID and SUN (secure unique nfc message), considering all security aspects?

Thank you and I appreciate it if you could answer all aspects of my question.

[KellyLi]

Hello @zahra2023 

Yes, you can develop NTAG424NDA  by yourself, and its design resources are all open source, except for some tools. Here are some suggestions for you:
1. You must carefully read the data manual and application documentation.
2. There is an example that could be helpful to your development suggest you refer to: Examples\NfcrdlibEx3_NFCForum.

BR

kelly