A new strategy document released by the White House did not explicitly name China, but warned that foreign governments and firms had stepped up efforts to steal trade secrets, threatening U.S. economic and national security.
Stepping Up Law Enforcement
It calls for greater coordination among different government agencies, for the private sector to be better informed about the risk of trade secrets theft and for stepping up intelligence and law enforcement efforts.
On Tuesday, the White House said it was constantly bringing up allegations of cyber-spying with China at the highest levels, including with the military.
China has denied charges of state-sponsored hacking and said Mandiant's claims had "no factual basis."
A defense ministry spokesman also said there was no clear internationally agreed definition for what constitutes a cyber attack.
The latest cyber security scare has seen firms, including the New York Times and the Wall Street Journal, report attacks believed to emanate from China, and comes amid mounting concern over hacking as a military threat.
The latest classified National Intelligence Estimate identified China as the country most aggressively seeking to penetrate the computer systems of U.S. businesses and institutions, the Washington Post reported this month.
The document, according to the Post, identifies energy, finance, information technology, aerospace and automotive companies as the most frequent targets of cyber attacks.
Damage Estimates is Tens of Billions of Dollars
Outside experts have estimated the damage to the U.S. economy in the tens of billions of dollars, the paper said.
In October, Defense Secretary Leon Panetta sounded the alarm about the growing threat of Internet attacks, warning of a "cyber-Pearl Harbor" and saying the military had amended its rules of engagement.
A Senate cyber-security bill backed by President Barack Obama failed to pass twice last year, with civil liberties groups expressing concerns about privacy and Republicans fearing new regulations and an expanded bureaucracy.
In response, the White House said it would consider executive action to strengthen cyber security, and Obama returned to that theme in his State of the Union address last month.
"We cannot look back years from now and wonder why we did nothing in the face of real threats to our security and our economy," he said.
Copyright Agence France-Presse, 2013