The U.S. Department of Justice has formally charged two members of a hacking group operating in China for illegally accessing computer systems of health insurer Anthem and stealing personally identifiable information (PII) of 78.8 million people. One of the hackers has been identified by his real name, Fujie Wang (a.k.a. Dennis Wang), while another is known only by aliases (a.k.a. Zhou Zhihong, Kim Young, Deniel Jack) and charged as John Doe. They were part of a larger group whose members remain unknown.
Source: Bleeping Computer