Last year, Facebook launched double validation, requiring users to provide phone numbers to secure their accounts. But users found that Facebook provided its phone number to advertisers to provide accurate advertising. After months of entanglement, Facebook finally acknowledged this practice.
But recently, users have found that Facebook's default settings allow everyone, whether or not they have a Facebook account, to search for the user's Facebook account information based on the phone number previously added to their account.
"For years, Facebook has claimed that the phone number used for double authentication is just to ensure the security of user accounts," Burch said. But now, anyone can search. And users can't shut down completely.
Last year, Facebook was overwhelmed by user privacy issues. In March, Facebook admitted that 87 million users'information was inappropriately shared by third parties. At the end of September, Facebook discovered another security vulnerability that allowed hackers to gain access to control user accounts, which affected up to 50 million accounts.
In December, the New York Times reported that, according to some internal documents and interviews, Facebook has provided users'personal data to more than 150 large companies worldwide over the years, involving far more content than Facebook had previously disclosed.