[homakov]

> I'm very keen to see if we can add support for the OP's authentication protocol soon

It doesn't sound plausible, it only works without a middlemen.

[skion]

There are probably several angles on this. One is to let our Authentiq ID mobile app support and sign in to SecureLogin sites. Another to let websites that use Authentiq automatically support sign-ins with SecureLogin. These look feasible at first sight.

A third, replacing our current auth flow with SecureLogin indeed isn't likely to work for reasons you mention.