Is it possible to write-protect an NFC tag using the Web NFC API?

Question

I'm trying to use the three basic NFC functions in Google Chrome (Web NFC API, navigator.nfc).

I know it's possible to read and write NDEF messages on tags. What I did not find out yet is how to protect the written data on the tag from being overwritten. Is this possible?

What exactly are you up to? Do you want to write-protect the data once written to the tag? — Michael Roland, Apr 25 '19 at 06:59

score 3 · Answer 1 · answered May 06 '19 at 07:02

The Web NFC API specification explicitly mentions write-protection of NFC tags as one of the highest-priority threats (see section 7.2):

Protecting existing NFC tags from being overwritten by malicious web pages.

However, in its current state, the Web NFC API itself does not provide a way to set write-protection for a tag.

Is it possible to write-protect an NFC tag using the Web NFC API?

1 Answers1