The thousands of people who waited an hour or more to get into Defcon drove home what a hot ticket this 14-year-old computer-hacking event has become. In years past, when would-be attendees couldn’t afford the admission price, they put their hacking skills to work by creating counterfeit badges. This year, organizers turned to Joe Grand, a designer of consumer electronics hardware, to come up with something that couldn’t be easily duplicated. Admission this year costs $100.