For years, the Signal messaging app has been a favorite for privacy-minded folks. However, it’s not perfect.
404 Media reported this week that the FBI was able to read a suspect’s Signal messages, which should not normally be possible. Signal messages are end-to-end encrypted, meaning only the sender and receiver should be able to read them. They also disappear over time, so as not to leave a trace. In this case, the user had also deleted the app off of their phone.
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So, how did the FBI see the messages? By reportedly extracting them from an iPhone’s push notification database, of course. If messages are displayed in a push notification, that technically skirts the whole encryption problem, making it possible for a third party to read them. This is true of any app with push notifications, not just Signal.
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