Nitrokey 3C NFC FIDO authentication failure

[jplejacq-quoininc-com]

Security key (FIDO) authentication fails (always fails) on when using NFC interface. Authentication works fine with USB C interface.

Hardware: Nitrokey 3C
Firmware: v1.5.0-test.20230704
Device: Pixel 6 Android 14
Browser: Firefox, Chrome, Brave

Steps:

1. Go to google.com and select login.
2. Provide user and password. Select Next. This is always successful.
3. Prompted for security key. This step is unreliable and often takes quite some time for device to be recognized. From the Nitrokey forums, this seems to be a know issue.
4. When device is finally recognized, site prompts to continue to hold Nitrokey next to device.
5. Screen displays "There was a problem. Try using your security key again or try another way to verify it's you." This always occurs.

A YubiKey 5C NFC works fine using the NFC interface. It is also immediately recognized by my phone.

[jplejacq-quoininc-com]

I cannot edit the initial report so some more details here.

1. This failures happens on all sites I've tried.
2. When device is recognized, screen displays a) continue to hole security key next to device; b) you're all set, you can remove the security device c) authentication failure. try again or another way.

[anotherbridge]

Is there any update on this?

I am having the same issue across different devices. I tested

• iPhone (different generations)
• LineageOS (Fairphone 3)
• Other Android phones

The firmware versions tested were:

• v1.7.0
• v.1.7.2
• v1.7.2-test.20240813

Browsers:

• Firefox
• Safari
• Chrome
• Brave

The phones can usually read out the data of the NFC tag, but FIDO authentication using the NFC interface won't work.

Further, I also tested with three different Nitrokeys to rule out that there are malfunctions on a single one.