To combat cyber attacks, the U.S. may need more than new cyber defenses. It might need a whole new piece of Internet infrastructure. So says former CIA director Michael Hayden, who served under President G.W. Bush, and he’s not the only one. Several lawmakers and the current Cyber Command chief Gen. Keith Alexander are toying with the notion of creating a “.secure” domain where Fourth Amendment rights to privacy are voluntarily foregone in order to keep that corner of the Internet free of cyber criminals.