South Korean investigators say they have proof that North Korea is launching cyberattacks . The U.S. government has been warning about the threat of cyber espionage for years and recently announced a new effort to counter it. December attack on banks in South Korea caused about $ 820 million worth of damage , a report says .
South Korean investigators say they have proof that North Korea is launching cyberattacks . Reports say the North is investing heavily in digital warfare . December attack on banks in South Korea caused about $ 820 million worth of damage , a report says .