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AWS will take its sovereign cloud off the backbone. Good test, but not custody

· re: AWS European Sovereign Cloud: demonstrating an independent operation (AWS Security Blog)

A dark card headed “Off the backbone for a few hours. Network independence is not custody.”, with tiles quoting AWS: “For several hours, the AWS European Sovereign Cloud will operate without a connection to the AWS Global Network backbone”, the operational team “composed entirely of EU residents within the EU”, the date Saturday 24 October 2026, and what the test cannot show: who holds the keys and whose law reaches the parent company. Footer: A good test of the cable. Custody is who holds the keys.

AWS is going to cut its European Sovereign Cloud off the AWS global backbone on Saturday 24 October, to prove it can run without anything outside the EU. Credit where it’s due, that’s a real test and not a slide. From the announcement: “For several hours, the AWS European Sovereign Cloud will operate without a connection to the AWS Global Network backbone.” The team running it is “composed entirely of EU residents within the EU”. (Customers “may experience brief connectivity disruptions” at the start and finish, which is what an honest test looks like.)

My read: it proves the network can stand on its own, which is useful. The question European buyers actually ask is “who can be made to hand the data over?”, and I suspect no cable test gets near that. It comes down to who holds the keys and which country’s law reaches the parent company. I made the same point a few weeks back in where is home for your data.

Net: worth doing, and the other hyperscalers should copy it. Just don’t read a few hours off the backbone as custody (that’s still about who holds the keys).