What is it used for?
The QR code contains:
- the monetary amount,
- parts of the recipient’s account number (both helps thwart MITM attacks)
- and a random challenge (which helps prevent replay attacks.)
That’s for the wireless model. Wired CAP devices don’t have a camera since they can use USB.
The QR code contains:
- the monetary amount,
- parts of the recipient’s account number (both helps thwart MITM attacks)
- and a random challenge (which helps prevent replay attacks.)
That’s for the wireless model. Wired CAP devices don’t have a camera since they can use USB.