Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

BERLIN, GERMANY - DECEMBER 28: A participant sits with a laptop computer as he attends the annual Chaos Communication Congress of the Chaos Computer Club at the Berlin Congress Center on December 28, 2010 in Berlin, Germany. The Chaos Computer Club is Europe's biggest network of computer hackers and its annual congress draws up to 3,000 participants. (Photo by Sean Gallup/Getty Images)
BERLIN, GERMANY - DECEMBER 28: A participant sits with a laptop computer as he attends the annual Chaos Communication Congress of the Chaos Computer Club at the Berlin Congress Center on December 28, 2010 in Berlin, Germany. The Chaos Computer Club is Europe's biggest network of computer hackers and its annual congress draws up to 3,000 participants. (Photo by Sean Gallup/Getty Images)

    JUST WATCHED

    Hackers protect networks from North Korea

MUST WATCH

Hackers protect networks from North Korea

CNN's Richard Quest meets the South Korean hackers who protect networks from cyber attacks.

Hackers protect networks from North Korea

CNN's Richard Quest meets the South Korean hackers who protect networks from cyber attacks.