Allegations that Chinese hackers infiltrated the computers of two leading U.S. newspapers add to a growing number of cyber attacks on Western companies, governments and foreign-based dissidents that are believed to originate in China, experts say.
According to one recent report, one in every three observed computer attacks in the third quarter of 2012 emanated from China.
Chinese officials have denied that Beijing has supported any cyber attacks, stressing that hacking is illegal in the country.