https://www.theguardian.com/technology/2021/apr/22/signal-founder-i-hacked-police-phone-cracking-tool-cellebrite

Moxie Marlinspike accuses surveillance firm of being ‘linked to persecution’ around the world

The CEO of the messaging app Signal claims to have hacked the phone-cracking tools used by police in Britain and around the world to extract information from seized devices.