The White House and the U.S. Chamber of Commerce dug in to opposing positions on cybersecurity legislation yesterday as federal officials escalate warnings about hacker threats to the nation.

An executive of the Chamber of Commerce, the largest U.S. business lobby, backed a voluntary system to let the government and industry share cyber threat information during a panel discussion at the National Press Club in Washington.

White House Cybersecurity Coordinator Michael Daniel stood behind the goal of President Barack Obama's administration to create cybersecurity standards for companies that operate power grids, chemical plants and other assets considered critical to U.S. national and economic security.