Gone are the days when a handkerchief draped over the handset was sufficient to disguise your voice on clandestine phone calls. The USAF certainly feels the need for a more advanced method of changing the voices of its airmen, and is investing in the development of technologies that will not just conceal the identity of a speaker, but make him or her sound like another person entirely. This will be used in ‘deception campaign[s] against enemy forces’ – which doubtless means more than just ordering unwanted pizza to be delivered to terrorist leaders. But the street finds its own use for things, and we may end up in a world where even our voices can’t be trusted to tell the truth about who we are. That will probably suit terrorists just fine.