[heavyset_go]

If it's truly sensitive data, encrypting with a unique private key and locking that with a PIN a la FIDO via NFC would be a bit more secure.

One master key leak and everyone is walking around with IDs that give away sensitive data over RFID.

[Nextgrid]

> sensitive data

"Sensitive" data that you already leave on everything you touch.

[heavyset_go]

You leave your DNA everywhere, too, but there are data security and privacy implications of digitizing that data and voluntarily/involuntarily sharing it with others.