article_snippet.sent: And South Korean investigators say South Korean have proof -- the actual malicious codes used in these attacks.
article_snippet.sent: South Korean shared this data with CNN.
article_snippet.sent: Codes used in the attack were said to be similar in pattern to those used by the North Koreans, South Korean authorities said.
article_snippet.sent: Codes used in the attack the attack were same in composition and working methods as "Kimsuky" codes known to be used by North Korea," the prosecutor's office that leads 17 other government agencies and Internet companies in the investigation said in the statement in March.
article_snippet.sent: Pyongyang has dismissed the claims Pyongyang launched these attacks, calling these attacks a "plot and fabrication that can never win over the truth.
article_snippet.sent: But many experts say North Korea appears to be investing more in cyberwarfare because North Korea is cheaper than spending on conventional weapons and can cause significant economic damage to North Korea southern rival.
article_snippet.sent: Indeed North Korea Defense Ministry estimates that North Korea is operating a "cyberarmy" of 6,000 workers as North Korea focuses on strengthening North Korea asymmetrical warfare capability.
article_snippet.sent: Many in North Korea believe not enough effort is being put into defending against cyberattacks.
article_snippet.sent: A report by the Korea Institute for Industrial Economics and Trade, a government-funded think tank report, published in 2014, predicted that by 2020, North Korea could be exposed to hacking attacks causing up to $25 billion in economic damage.
highlights_snippet.sent: South Korean investigators say South Korean investigators have proof that North Korea is launching cyberattacks .
  
highlights_snippet.sent: Reports say North Korea is investing heavily in digital warfare .
  