https://www.cnbc.com/id/105113671

Facebook needs to make sure the new tools it has introduced to help safeguard user data in the wake of the Cambridge Analytica scandal is done in "practice and not only on paper," the European Union's top data watchdog told CNBC.

The social network has unveiled a raft of new tools since news of the fiasco broke, with the aim of helping users understand and control how their data are used.