Inadequate protection of personal data on Facebook has opened up in a new light. The representative of the social network admitted that it was very likely that scammers copied all the public information about 2 billion Facebook users. Previously, in the social network you could find a person’s profile by phone number or email address. This is what the attackers took advantage of, first “recovering” the user’s account, and then copying all open information. Due to the magnitude of such requests, company representatives suggested that attackers copied data from almost all users of the social network. In this regard, such search functions, as well as information about political views and family status, have become hidden to prying eyes, and the procedure for recovering an account is complicated. Regarding the scandal related to the use of personal data of more than 50 million Facebook users by the British analytical company Cambridge Analytica, the social network after an internal investigation said that the leakage was larger and amounted to 87 million accounts. It is noteworthy that the open detection functions could be turned off, but few users took advantage of this opportunity. And most often because of the ignorance of such an account setup. However, there is a series of data that always remains open, regardless of privacy settings: the specified name, gender, username in the address bar and its numerical display, profile photo, cover photo, age group.