The head of telecommunication company, T-Mobile US, has lashed out at the world's largest credit checking firm, Experian, over a massive hack attack that stole the personal information of millions of Americans.
"I am incredibly angry about this data breach and we will institute a thorough review of our relationship with Experian," said John Legere, the chief executive of T-Mobile US.
The comments follow a massive data breach at Experian where the personal information of as many as 15 million T-Mobile consumers was stolen.
The attack is the most recent by hackers targeting companies holding personal details of millions of customers, a CNBC report said, adding that identity theft has become more lucrative than stealing credit card details.
Experian is the world's largest credit-checking company and holds data on millions of businesses and consumers and conducts billions of credit checks a year.
Its web of electronic connections to companies of all sizes makes it attractive to hackers. Defending the company and its customers from cyber attack has been a board-level priority in recent years.
T-Mobile said "the hacker[s] acquired the records of approximately 15m people, including new applicants requiring a credit check for service or device financing from September 1, 2013 through September 16, 2015".
These records included personal details such as name, address and date of birth as well as encrypted fields with Social Security numbers and identification numbers from driving licenses or passports. Experian said this encryption may have been compromised.