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Invisible weapons pose constant threat to cybersecurity

Vulnerability in Microsoft OS exploited by US government, then stolen by hackers

TOKYO -- Cyberspace is a battlefield where countries, big or small, compete to obtain intelligence to attack others. Last month, it was ordinary citizens and businesses that fell victim to invisible cyber weaponry.

An international conference on information technology was held on May 25 in China's Guizhou Province. Shen Changxiang, the 76-year-old cybersecurity authority in China, told executives of the world's leading IT companies that hundreds of thousands of computers are reported to have been affected in China by a recent computer virus and that the virus has disrupted the education, transport, health care and energy sectors, among others.

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