Facebook to integrate the infrastructure for WhatsApp, Instagram and Messenger
> Mr. Zuckerberg has also ordered all of the apps to incorporate end-to-end encryption, the people said, a significant step that protects messages from being viewed by anyone except the participants in the conversation.<p>I don't blame NYT for getting this wrong wrt WhatsApp but it bears repeating: if you let someone else broker the key exchange, you trust them implicitly.  That is to say that IMO this is not truly trustworthy "end to end encryption".  To add insult to injury, WhatsApp permits rekeying to take place without any indication to the conversation's participants [in the default settings].