China-Tied Hackers That Hit U.S. Said to Breach United Airlines - Bloomberg Business

Tangentially, see How Many Times Has Your Personal Information Been Exposed to Hackers? (NYT)

"It’s increasingly clear, security experts say, that China’s intelligence apparatus is amassing a vast database. Files stolen from the federal personnel office by this one China-based group could allow the hackers to identify Americans who work in defense and intelligence, including those on the payrolls of contractors. U.S. officials believe the group has links to the Chinese government, people familiar with the matter have said.
That data could be cross-referenced with stolen medical and financial records, revealing possible avenues for blackmailing or recruiting people who have security clearances. In all, the China-backed team has hacked at least 10 companies and organizations, which include other travel providers and health insurers, says security firm FireEye Inc."

China-Tied Hackers That Hit U.S. Said to Breach United Airlines - Bloomberg Business