The Texas Comptrollers office will begin sending notification letters to some 3.5 million employees and teachers. The unencrypted data was placed in public-facing servers in violation of state policy, officials say. Names, mailing addresses, Social Security numbers, and some dates of birth or driver’s license numbers were embedded in a chain of numbers. The data files transferred by those agencies were not encrypted as required by Texas administrative security policy, the state says. The mistake was discovered the afternoon of March 31, when the agency began to seal off public access to the files.”]