WhatsApp: Security experts warn that Facebook's chat app can be insecure, despite Amnesty recommendation

WhatsApp and Facebook Messenger are the most secure chat platforms, according to Amnesty International. But that decision has already met with scepticism from people in the technology community, some of whom have warned that it might not be safe to use the apps at all. Amnesty gave Facebook and WhatsApp a score of 73 out of 100 – its highest – to the two apps, which it didn't distinguish between. But it particularly picked out WhatsApp, which it said was "the only app where users are explicitly warned when end-to-end encryption is not applied to a particular chat". It did have some criticism for Facebook, which doesn't apply strong encryption by default and doesn't warn users that they're not using the most secure technology.