Write Protection for NFC

[Sumit Jena]

I want to avoid to have the NFC tag to be writeable with another nrf device but i do not want it to be writable by any other type of device such as a phone. How do I put such type of write protection over NFC.

[Simonr]

Hi

I think we need some more information on what exactly your end goal is here, and what options the reader you're using has. 

Please note that the NFCT peripheral on the nRF5x series devices is only an NFC tag, and does not have any read capabilities unless you add a separate NFC Reader to your board/design. I'm not aware of any protection like this for an NFC device as a tag is just passively waiting for any NFC field, but I guess it could be possible to for example make the user (person trying to read the tag) write a passkey/code to the tag in order to unlock/decrypt whatever you're planning on reading.

Best regards,

Simon