After being amazed by reports on low-level vulnerabilities in technical media, Raoul started a PhD on low-level security architectures. He was one of the first group of researchers taking an interest in protected-module architectures. Since Intel ships Intel Software Security eXtensions with almost every new Intel processor, interest of both industry as academia has skyrocketed. As of 2017 he has been working on speculative execution attacks. His Foreshadow/L1TF attack received worldwide attention.