A.
You can choose one or more method of your choice. It is not necessary to register for all three.
If you are already using biometric authentication on your device, we recommend that you use "Biometric authentication, passcode authentication, etc."
If you use multiple computers and smartphones, we recommend using "Authentication by Email" or "Authentication by App". If you are not adept at using technology, we recommend "Authentication by Email" as it is easy to set up and operate.
For detailed information on how to register, please refer to section "2. Types and Features of
Identity Verification Methods" in the Expo ID Registration Manual below.
ExpoID Registration Manual: