A data breach in 2016 affected approximately 50 million riders and 7 million drivers on the Uber platform.

The breach exposed the names, phone numbers and email addresses of the affected parties, including about 600,000 driver license numbers of U.S. drivers.

The shameful aspect is the action taken by the ride-hailing platform to suppress this information by paying hackers $100,000 to keep word of the breach from getting out, according to a report from Bloomberg.

The report did not specify the identity of those behind the beach, and says the stolen information does not appear to have been used, so far.

Uber’s new CEO Dara Khosrowshahi communicated to Bloomberg that Uber has closed the security loopholes that enabled the breach.

Uber Chief Security Officer Joe Sullivan and a key senior deputy to the CEO have been relieved of thier duties, mainly due to their role in the cover-up.