To proof his/her identity ADUCID provides a feature called personal code
As soon as Personal Code is created user can add a comfort factor. When service provider allows,
Possible types of the Comfort factor:
| NFC | On Android phone a user can use a NFC tag. |
| Apple Touch ID | On iOS devices with fingerprint sensor (iPhone 5S or better) user can activate fingerprint factor as addition to his / her secret. |
| Apple Face ID | On iPhone X user can activate face recognition factor as addition to his / her secret. |
| Fingerprint | For phones with native Android fingerprint support (not for proprietary implementations). |
| Bluetooth | User can user some BT device like sport tester - something she/he has. When BT device is visible, CF authentication is automatically resolved. |