Charlie Miller is Principal Research Consultant at Accuvant Labs and a four-time CanSecWest Pwn2Own winner.
Dionysus Blazakis is an expert on iOS and OS X sandbox security mechanisms.
Dino Dai Zovi is coauthor of The Mac Hacker's Handbook and a popular conference speaker.
Stefan Esser is a PHP security expert and leading researcher of iOS security topics.
Vincenzo Iozzo is an independent security researcher focused on Mac OS X and smartphones.
Ralf-Philipp Weinmann holds a PhD in cryptography and has an extensive security background.