A new FBI-related case shows how iPhone notifications can expose message content, even from apps designed to keep conversations private.
Recent courtroom testimony revealed that investigators recovered deleted messages from a suspect’s iPhone by extracting data stored in Apple’s notification system. This includes messages from encrypted apps like Signal, which typically use end-to-end encryption to protect conversations.
According to 404 media, the FBI accessed incoming Signal messages that remained stored in the iPhone’s internal notification database. Even after the app was deleted, those message previews stayed on the device.
When your iPhone shows message previews on the lock screen or notification panel, it stores parts of that content locally. These stored previews exist outside the app itself, so deleting the app does not always remove them.
The issue is not limited to Signal. Any messaging app that displays content in notifications can leave similar traces.
Encryption didn’t fully protect messages
Signal still encrypts messages properly. The problem comes from how iOS handles notifications.
When a message arrives:
- Signal decrypts it on your device
- iOS creates a notification preview
- That preview gets stored in the system database
This means convenience features like lock screen previews can create a separate copy of your messages.
How to fix it on your iPhone
You can stop this behavior by disabling notification previews. This prevents message content from being stored in the first place.
Turn off previews for all apps
- Open Settings
- Tap Notifications
- Tap Show Previews
- Select Never
Turn off previews for specific apps
- Go to Settings > Notifications
- Select the app (like Signal or WhatsApp)
- Tap Show Previews
- Set it to Never
Extra step inside Signal
You should also limit what Signal shows in notifications:
- Open Signal > Settings > Notifications
- Tap Notification Content
- Choose No Name or Content
This ensures that even if notifications appear, they do not include sensitive data.
Wrap-Up
This case highlights a simple issue. Encryption protects messages inside apps, but system-level features like notifications can still store readable content.
If you want better privacy, you need to adjust both iOS settings and app-level notification controls. These changes take less than a minute and stop your messages from leaving traces in notification storage.
This doesn’t solve the problem only covers it. It’s extremely inconvenient not being able to see content on your lock screen and this will always be the problem with any privacy respecting choice.
Beneficial article, thanks! So how do we delete the previews taht exist already? 😉