North Korea boosted 'cyber forces' to 6,000 troops, South says

SEOUL (Reuters) - North Korean military's "cyber army" has boosted its numbers to 6,000 troops, the South Korean Defence Ministry said on Tuesday, double Seoul's estimate for the force in 2013, and is working to cause "physical and psychological paralysis" in the South. The new figure, disclosed in a ministry white paper, comes after the United States, South Korea's key ally, imposed new sanctions on North Korea for a cyber attack on Sony Pictures Entertainment