MarketWatch First Take: Zuckerberg’s privacy pledge presents a big conundrum for Facebook

Mark Zuckerberg’s surprise privacy pledge on Wednesday raised some skepticism and more questions for Facebook Inc., including from investors, about how the social network can execute on much stricter privacy while still keeping its business model intact.

In Zuckerberg’s blog post, he said that Facebook FB, -1.96% is going to build a privacy-focused platform, built around truly private, encrypted interactions on its Messenger, WhatsApp and Instagram messaging systems so that no one beside the sender and recipient — neither hackers, nor governments, nor even Facebook itself — can read them. He said Facebook plans to rebuild more of its services around these ideas, much as it has done with the messaging company WhatsApp, which it purchased for $19 billion in 2014.

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