Factor Type signed_nonce corresponds to which feature?

Dear team
for the api /api/v1/users/${userId}/factors

in the response i am seeing a factor type “signed_nounce” . Its corresponds to which factor type in okta verify , is it push , otp or fast pass ?

Thanks and Regards

Looks like it’s Okta Verify Push?

Enrolls a user with the Okta Verify push factor, as well as the totp and signed_nonce factors (if the user isn’t already enrolled with these factors).