【ニュース】
◆Facebookはユーザーに公開されない「影の連絡帳」を広告主に提供している (Gigazine, 2018/09/28 17:00)
https://gigazine.net/news/20180928-facebook-shadow-contact-information/
◆Facebook Is Giving Advertisers Access to Your Shadow Contact Information (Gizmodo, )
https://gizmodo.com/facebook-is-giving-advertisers-access-to-your-shadow-co-1828476051
【資料】
◆Investigating sources of PII used in Facebook’s targeted advertising (Giridhari Venkatadri, Elena Lucherini, Piotr Sapiezynski, and Alan Mislove)
https://gigazine.net/news/20180928-facebook-shadow-contact-information/