FBI used iPhone notification data to retrieve deleted Signal messages

The FBI successfully recovered deleted Signal messages from an iPhone by accessing data cached in Apple's notification storage system, revealing a significant privacy and security gap that exists even after applications are uninstalled. This incident demonstrates that end-to-end encrypted messaging apps cannot fully protect user data when notification preview settings are enabled, and highlights potential vulnerabilities in how iOS manages sensitive data across system states and backups. For IT organizations, this underscores the critical need to establish mobile device management policies that enforce secure notification settings, educate users about encryption limitations, and reassess assumptions about data deletion and law enforcement access.