Notifications Leak Secure‑Message Content

iPhones persist lock‑screen notification previews in an internal database that can be forensically extracted even after a secure‑messaging app is deleted, exposing incoming message content that users may have assumed was ephemeral or protected. This technical behavior means that app settings and OS defaults (show previews on lock screen) materially change the privacy guarantees of end‑to‑end encrypted apps. — This matters because it identifies a practical surveillance vector that undermines commonly held expectations about secure messengers and suggests a policy, litigation, and product‑design response is needed.