Sandy Clark (Mouse) has been taking things apart since the age of two, and still hasn't learned to put them back together. An active member of the Hacker community, her professional work includes an Air Force Flight Control Computer, a simulator for NASA and singing at Carnegie Hall. She is currently fulfilling achildhood dream, pursuing a Ph.D. in Computer Systems and Security at the University of Pennsylvania.

Her research explores the vulnerability lifecycle, human scale security and the unexpected ways that systems interact. A founding member of Toool-USA, she also enjoys puzzles, toys, Mao (the card game), and anything that involves night vision goggles.