CareFirst BlueCross BlueShield announced Wednesday that Chinese hackers last year infilitrated their computer systems and potentially gained personal information on 1.1 million current and former customers. CareFirst serves Maryland, D.C., and parts of Virginia. "Limited personal information was involved in this attack – for instance, no member Social Security Numbers, medical claims information or financial information was put at risk," it said in a statement, adding that free credit monitoring and ID protection will be offered to everyone for two years.
