https://phys.org/news/2019-03-privacy-pivot-facebook-whatsapp-scarce.html

Zuckerberg's essay, entitled "A privacy-focused vision for social networking," signals a radical shift. Since its launch in 2004, Facebook has encouraged openness, connection and sharing. But now, it would be "privacy-focused," featuring encrypted services and content that "won't stick around forever."

Facebook will, says Zuckerberg, transform from open to intimate, from town square to living room. In total, the words "privacy," "private" and "privately" appeared more than 50 times. As Zuckerberg wrote: "Over the last 15 years, Facebook and Instagram have helped people connect with friends, communities, and interests in the digital equivalent of a town square. But people increasingly also want to connect privately in the digital equivalent of the living room."