3 ms·
>NFC chips have allocated uids -- QRs are mutable. NFC is mutable too; the low-cost unpowered chips you'll buy are mostly write-once read-many, but an NFC devi
by ryukafalz 7y ago
>NFC chips have allocated uids -- QRs are mutable.
NFC is mutable too; the low-cost unpowered chips you'll buy are mostly write-once read-many, but an NFC device with host card emulation can largely be whatever you want it to be. I suppose it's analogous to a QR code displayed on a screen vs. a printed QR code.
- s_dev 7y ago>but an NFC device with host card emulation can largely be whatever you want it to be. Nope -- even host card emulation can't emulate the UID for obvious reasons. Hence making it controlled.
- ryukafalz 7y agoWell sure, but it can emulate just about everything else. And if you're depending on the UID not being spoofable, well... https://www.aliexpress.com/popular/nfc-card-writable-uid.html https://www.aliexpress.com/popular/nfc-card-writable-uid.htm...