The issue focused on the federal government's response to the technology.

Billionaire technology investor Tom Perkins, who has also held industry events in recent years, said the federal government "can't just take the technology and say, 'This is an industry and you can't do this.' "

"It's an issue of national security and who's going to have the technology to deal with it," he said.

The events are part of a private industry effort to address the security issues that