IT World writes: "Trying to predict the big news at this week's Black Hat and Defcon conferences is extremely tricky, if not impossible. Usually the most interesting stories pop up at the very last minute -- hackers tend to hold off on disclosing the really big talks because they don't want jittery lawyers to shut them down. And even when you think you know what's going on, sometimes one of the shows steps forward to take center stage, as Defcon did three years ago when Dateline NBC reporter Michelle Madigan was run out of the conference for trying to secretly film show attendees.
Black Hat, the more corporate event, and its unruly sister conference, Defcon, are held one after the other each year in Las Vegas. This year's Black Hat conference is on Wednesday and Thursday. Defcon runs Friday through Sunday.
So expect some chaos this week in Las Vegas. Expect some surprises."