SQRL – Secure Quick Reliable Login
This is actually implemented in the biggest bank of Ukraine, PrivatBank.1. Open login page https://www.privat24.ua on the computer, you'll see a QR code,2. Take your phone, open bank's official Privat24 app,3. Within the app select "Scan QR code",4. Upon scanning, the page on the computer is reloaded and you are presented with the dashboard.Very convenient. I wish more services across the internet would provide the same means to log in (although, of course not every one service can afford having a dedicated mobile app).