Comment by amne

I was asking myself the same thing while watching the live stream where they somehat explained how it works.

It's still not clear to me if they are compliant.

To make it work like in the browser it would require some sort of SSH multiplexing where your client is connected to both the shop and Stripe's SSH server and you enter your card data into a terminal region that is being rendered by stripe's ssh server. And then the triangle is completed by Stripe notifying the shop that the payment is ok.