
(Reuters) - Experian Plc , the world's biggest consumer credit monitoring firm, on Thursday disclosed a massive data breach that exposed sensitive personal data of some 15 million people who applied for service with T-Mobile US Inc .
Connecticut's attorney general said he will launch an investigation into the breach.
Experian said it discovered the theft of the T-Mobile customer data from one of its servers on Sept. 15. The computer stored information about some 15 million people who had applied for service with telecoms carrier T-Mobile during the prior two years, Experian said.
T-Mobile Chief Executive John Legere said the data included...