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).

    • forestbeasts@pawb.socialEnglish
      3·
      3 months ago

      There’s Matrix which is selfhostable but “good” is pushing it and the cryptography is a bit iffy (probably more incompetence than malice). Though selfhosting it means you don’t need the end to end encryption quite as much… until the court gets involved of course.

      – Frost

    • TheFrirish@tarte.nuage-libre.frFrançais
      2·
      3 months ago

      As of now the most complete alternative (albeit controversial) is the decentralised SimpleX Chat. But it’s not as easy to use as Signal.