webAuthn get did not return a valid signature

Samsung Internet
1

Hi team,

I am using Android 11 with Samsung Internet version v28.1.0.59, when calling webAuthn get() function to sign the challenge, the OS prompt can appear correctly, but when we verify the signature, it can not be successful. But in the same device, other browsers do not have this issue like Chrome.

Can you help check the reason?

2

Hi

Can you provide some screenshots?

Thanks.

3

Screenshot 2025-10-07 at 17.10.02
Screenshot 2025-10-07 at 17.10.02415×715 111 KB

Screenshot 2025-10-07 at 17.12.13
Screenshot 2025-10-07 at 17.12.13273×693 83.1 KB

We used this site to test the FIDO hard token device https://webauthn.io/ but have this error.

4

I don’t know what part of the Web Authentication API that website uses, but some parts were not supported until Chromium 133, and the stable version of Samsung Internet is built on Chromium 130 currently. The Beta is built on Chromium 136 and may work. See also Web Authentication API - Web APIs | MDN