Facebook staff did not refute the results of the study.
Social network Facebook has given advertisers a hidden personal phone numbers.
This was reported in a study of a group of scientists from Princeton and northeastern universities.
Experts loaded several hundred mobile numbers of users. Later it was discovered that the network uses them for ad targeting. This occurred even if the user has hidden this information in your profile.
One of the researchers named Alan Mislove (Alan Mislove) said that never entered your room account. Despite this, he noticed in the tape the ads targeted using this data. It became clear that advertisers were also available rooms that people used to set up two-factor authentication or automatic notifications.
Commentary portal Gizmodo, the representative of the social network said the service uses all the information available for better targeting.
“You can manage and delete contact information that you have uploaded at any time”, – said the speaker.
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