Re: I wonder how Facebook is going to implement the encryption
Given that Facebook is primarily used on mobile and laptops, there's an even easier way to get the data.
For phones, use the baseband backdoor.
For laptops, use the ME/PSP backdoor.
This is either a well-engineered smear attempt to make Messenger look secure (and therefore push stupid people to publish incriminating information on it) or complete cluelessness regarding the existing access mechanisms.