David_Mendoza

This is the notification layer, but the same structural problem exists one level deeper: the OS vendor is the custodian of the user's entire digital identity, not just message contents, but context, behavioral history, and application relationships. The notification routing is a symptom. The custody assumption underneath it is the root.

As long as your identity lives inside a vendor-controlled OS, encryption at the app layer is a patch on a structural problem

The cloud dependency problem goes deeper than the model layer though. Even if you run inference locally, your digital identity — your context, your applications, your behavioral history, is still custodied by whoever controls your OS.

Local models solve one layer of the dependency stack, but the custody assumption underneath it remains intact. That's the harder problem.