The TW Fido app (Android or IPhone) allows you to use your phone to verify your identity online when dealing with government agencies. To use the app you must first apply for an Alien Citizen Digital Certificate (instructions here).

First of all, go to the FIDO website. Then click 註冊／綁定 (Register/Validate device):

You’ll be prompted to enter your ID/ARC number and your pin (you should set this after you activate your card), with your card inserted into a card reader (learn to install a card reader here):

Then you press 送出 (send) and you’ll come to the next screen which asks you to check some details and enter your email and phone number:

Next, a QR code will appear, which you’ll have a limited amount of time to scan with your app. When you click 註冊／綁定 (Register/Validate App) on your phone, a QR code scanner should appear, and you can scan your computer screen. Then you’ll be asked if you want to use your phone’s fingerprint/face-recognition capabilities to verify your identity when you use the app. I clicked 是 (yes):

Then there’s one final screen where you need to complete the process (完成） and you’re ready to go:

I’ll update soon with what you use the app for!