Eloi Sanfelix works as a Principal Security Analyst at Riscure, where he performs security evaluations on different products ranging from software-based solutions to embedded systems. Most of his working time is currently spent reverse engineering and analyzing protected software such as DRM systems and mobile payment applications. In the last few years, he has also been involved in evaluating the security of embedded systems and smart card technology, mostly for the PayTV and the payment industries. In his spare time, Eloi enjoys participating in CTF competitions with the int3pids team.