How secure is NFC automation? if I put the NFC sticker on my front door and someone scans the sticker will any home assistant app recognize it or will it only work for me if I’m signed into my account?
This.
Without them being logged in to your HA, it’s useless. Your use-case is exactly what I do.
Think of the NFC tag as a web link - anyone can click on it, but both a login and network access are still needed for access.
On the other hand, think of other exploits…
- NFC tags are better than QR codes as you need more than a printer to alter
- NFC tags are out in the open - anyone can see what you are doing
- NFC tags may not be weather proof - can you still get in if the tag fails?