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[SAN FRANCISCO] Uber said Tuesday hackers compromised personal data from some 57 million riders and drivers in a breach kept hidden for a year.
"None of this should have happened, and I will not make excuses for it," said a statement from chief executive Dara Khosrowshahi, who took over at the ridesharing giant in August.
Two members of the Uber information security team who "led the response" that included not alerting users that their data was breached were let go from the San Francisco-based company effective Tuesday, according to Mr Khosrowshahi.
The Uber chief said he only recently learned that outsiders had broken into a cloud-based server used by the company or data and downloaded a "significant" amount of information.
Stolen files included names, email addresses, and mobile phone numbers for riders, and the names and driver license information of some 600,000 drivers, according to Uber.
Uber paid the hackers US$100,000 to destroy the data, not telling riders or drivers whose information was at risk, according to a source familiar with the situation.
Co-founder and ousted chief Travis Kalanick was advised of the breach shortly after it was discovered, but it was not made public until Uber's new boss Mr Khosrowshahi found out.
"You may be asking why we are just talking about this now, a year later," Mr Khosrowshahi said.
"I had the same question, so I immediately asked for a thorough investigation of what happened and how we handled it."
He said that what he learned about Uber's failure to notify users or regulators has prompted corrective actions.