Wookey is a secure USB mass storage project, developed by ANSSI. Every two years a challenge in organized to evaluate CESTI/ITSEF, this year the Wookey project was chosen as a challenge target. This presentation details Synacktiv's results found during the hardware and software evaluation. A specific focus will be on the power glitches attacks and Wookey kernel exploitation.David Berard is a security expert at Synacktiv in the reverse engineering team. He is specialized in mobile and embedded systems reverse engineering, vulnerability research and exploit development.