(Reuters) – Defense Secretary Chuck Hagel said on Friday that cyber threats posed a “quiet, stealthy, insidious” danger to the United States and other nations, and called for “rules of the road” to guide behavior and avoid conflict on global computer networks.

Hagel said he would address cyber security in his speech on Saturday to the Shangri-La Security Dialogue in Singapore and the issue was likely to come up in a brief meeting with Chinese delegates on the margins of the conference.

“Cyber threats are real, they’re terribly dangerous,” Hagel told reporters on his plane en route to the gathering. “They’re probably as insidious and real a threat (as there is) to the United States, as well as China, by the way, and every nation.”

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