At last month’s Shmoocon security conference in Washington, I was looking for gear for the Ars Tech Lab’s hostile network environment. As I was browsing, I ran across a table manned by Gene Bransfield, the founder and CEO of WarCollar Industries LLC. People were gathering to look into little black boxes with the sort of delight you only find at security conferences.

The boxes were “360 Dope Scopes”—devices originally created by Bransfield for a security game at last year’s Shmoocon. The DopeScope is a self-contained Wi-Fi scanner that can do quick reconnaissance of the wireless environment wherever you are—and a tool for hunting down where access points are physically located.