this post was submitted on 07 Apr 2026
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206
Signal messages retrieved from iOS notification, as seen in Prairieland federal trial (infosec.pub)
submitted 18 hours ago by frocalannifo@fedia.io to c/technology@lemmy.world
53 comments fedilink hide all child comments
 

TLDR: signal content in Apple notification can be retrieved even after signal app deletion.

I saw from this reddit thread: Signal messages retrieved from iPhone after uninstalling app. : signal

Referencing this news article: Pretti Killing May Affect ICE Prairieland "Antifa Cell" Terrorism Trial

The mention of signal is in court documents here: March 10: Federal Trial Day 12 - Support the Prairieland Defendants

Signal chat evidence from Sharp’s device (Exhibit 158):
Messages were recovered from Sharp’s phone through Apple’s internal notification storage — Signal had been removed, but incoming notifications were preserved in internal memory. Only incoming messages were captured (no outgoing).

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[–] HumbleExaggeration@feddit.org 32 points 16 hours ago* (last edited 9 hours ago) (1 children)

So you are telling me an app is encrypting the shit out of every message so it can secretly delivered to another person. An then the persons phone decrypts the message and broadcasts it to an apple server, so it can get send back and make the phone go 'ding'?

Shouldnt the notification be handled inside signal somehow, so this is the only app with the decrypted message?

What is next, everything from my ram needs to go through google servers to be transmitted to my display?

[–] RunningInRVA@lemmy.world 45 points 16 hours ago

The Signal server would send a backend notification to the client app via the Apple Push Notification Service. The app is then able to wake up, at which point it fetches new messages (securely) from the Signal servers. The app then generates a local notification with a preview of the received message. iOS is then logging those messages.