By trusting the US, we handed Trump a kill switch. Yet Europe’s digital sovereignty is an achievable goal By trusting the US, we handed Trump a kill switch. Yet Europe’s digital sovereignty is an achievable goal T he French judge Nicolas Guillou knows exactly how deep Europe’s dependence on US tech is. Guillou and his colleagues at the international criminal court are under US sanctions. They can no longer use e-commerce, book hotels online or hire a car. Their home smart devices ignore them.