Citigroup says it lost 3.9 million customers' data

The tapes contained names, Social Security numbers, account numbers and other personal information of CitiFinancial customers in the U.S., as well as clients with closed accounts from its CitiFinancial retail-services unit. The tapes didn't contain any customer information from the New York financial-services giant's auto, mortgage or any other Citigroup business, or its CitiFinancial customers in Canada or Puerto Rico, the company said.
"There is little risk of the accounts being compromised because customers have already received their loans, and no additional credit may be obtained from CitiFinancial without prior approval of our customers, either by initiating a new application or by providing positive proof of identification," said Kevin Kessinger, executive vice president of Citigroup's global consumer group, in a statement. Beginning in July, this data will be transmitted electronically in encrypted form, he said.