“...Facebook announced earlier this year preliminary results from its efforts to move a global mass surveillance infrastructure directly onto users’ devices where it can bypass the protections of end-to-end encryption.
In Facebook’s vision, the actual end-to-end encryption client itself such as WhatsApp will include embedded content moderation and blacklist filtering algorithms. These algorithms will be continually updated from a central cloud service, but will run locally on the user’s device, scanning each cleartext message before it is sent and each encrypted message after it is decrypted.”