An attack on the Nationwide Insurance computer network could affect the personal information of an estimated 1.1 million customers of the Columbus, Ohio-based insurer and one of its affiliates, Allied Insurance.

In a letter to policyholders identified by the carrier as possibly affected by the Oct. 3 data breach, Nationwide informed them that the information accessed by the hackers includes names, date of birth, Social Security numbers, and driver’s license information both for customers and those who sought insurance quotes. Nationwide reports there is no evidence that any medical information or credit card account information was stolen in the attack

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