Signal was not broken. The FBI reportedly recovered deleted incoming Signal message previews from an iPhone’s notification database after physical access to the device. That points to an endpoint and notification-preview problem, not broken encryption.
How the FBI Read Signal Messages Without Breaking Signal | April 14, 2026
A court case revealed that deleted Signal messages can survive somewhere Signal has no control over: your phone's notification database.
Techlore (techlore.tech)
How many people lock down the app but forget the phone?