The senators posed 11 questions including when Uber first learned about the data breach, how many customers were affected, what types of data were compromised, what regulators were notified, and what steps were taken to mitigate potential harm to consumers whose information was comprised. It's monitoring the affected accounts and has flagged them for additional fraud protection.
The breach saw details of 57 million accounts compromised, and Uber has been heavily criticised for not admitting sooner that its systems had been hacked, and for paying off those responsible. "The order also requires Uber to implement a comprehensive program to protect the privacy and confidentiality of the personal information it collects and maintains". Now, after some further digging, it seems that 2.7 million of those affected were Uber customers from the UK.
The stolen information includes names, email addresses and phone numbers and - for U.S. drivers - licence numbers. Ferguson says that Uber did not notify his office until this month, more than a year after the breach.
Separately, prosecutors in the United States have heard that Uber may have hired ex-CIA intelligence operatives to conduct surveillance on its rivals.
Uber failed to disclose a massive breach past year, which disclosed the data of some 57 million users, the company's new chief executive officer said last week, according to Reuters.More news: Kylie Jenner hosted the Kardashian's Thanksgiving and it was SO extra
The attorney general is seeking a penalty of $2,000 for each of the almost 11,000 Washington residents affected by the breach.
Uber's data breach has got the attention of Washington state attorney general Bob Ferguson, who has begun the process of filing a multi-million dollar consumer protection lawsuit against the transportation company.
The lawsuit was filed Tuesday in King County Superior Court.
Under current British law organisations which fail to disclose data breaches to regulators face a maximum fine of up to 500,000 pounds.
Digital minister Matt Hancock said in a written statement: "The government expects Uber to respond fully to the incident with the urgency it demands and to provide the appropriate support to its customers and drivers in the UK".