The Presidential Daily Brief

intriguing

  1. mark zuckerberg not smiling shutterstock 181985711

    Facebook Uses Phone Numbers for Ad Targeting

    Who’s calling, please? Following a Gizmodo report citing an investigation by Northeastern and Princeton researchers, the social media company confirmed that it uses the phone numbers provided by users — ostensibly for two-factor authentication — to target them and their contacts with advertisements. Facebook previously denied using this “shadow profile” information for advertising, and its former security chief wrote in February that he hoped people didn’t skirt “helpful security features” over fears of ad targeting. The company said users could avoid the issue by opting out of phone number-based authentication.

This story is part of The Presidential Daily Brief

view full edition