That's how it could work for other app developers, but in WhatsApp's case, WhatsApp is already capable of replacing users' encryption key with its own. https:/

That's how it could work for other app developers, but in WhatsApp's case, WhatsApp is already capable of replacing users' encryption key with its own. https://www.theguardian.com/technology/2017/jan/13/whatsapp-design-feature-encrypted-messages https://www.theguardian.com/technology/2017/jan/13/whatsapp-... It's a shame much of the crypto community was "skeptical" at the time that WhatsApp would use this capability for anything other than sending users "lost messages", because it's exactly the kind of thing I would expect companies that want to comply with secret (or otherwise) government orders to implement, while having a "reasonable" public excuse for implementing such a feature.