Hana SK Card Co., a South Korean credit card firm, said Monday that some 200 customers\' personal information has been leaked, the latest in a series of security breaches that are spurring concern about private data protection. The card firm, a joint venture between Hana Financial Group Inc. and SK Telecom Co., said the leaked data included \"name, address and resident registration numbers\" but did not cover information on financial transactions like customers\' passwords and account numbers.