The White House and the U.S. Chamber of Commerce dug in toopposing positions on cybersecurity legislation yesterday asfederal officials escalate warnings about hacker threats to thenation.

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

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