Cambridge Analytica got its paws on information about 50 million Facebook users collected via a personality testing app. Facebooks Chief Security Officer Alex Stamos said it was unfair to describe what happened as a breach, in a now-deleted tweet. The claim of a data breach stung Facebook badly, as the implication for the average person in the street would be that hackers somehow managed to infiltrate Facebook’s servers and make off with a haul of personal information. Facebook has been working this way for years, but this is how Facebook is supposed to work.”]
Source: https://grahamcluley.com/cambridge-analytica-controversy-was-there-a-facebook-data-breach/