Samuel Groß is an independent security researcher and, in his spare time, a Master's student at Karlsruhe Institute of Technology. He has been researching browser security for some years now and has published multiple articles on the subject, including a Phrack paper about JavaScript engine exploitation techniques at the example of JavaScriptCore, the JavaScript engine inside WebKit/Safari. He successfully participated in the yearly Pwn2Own contest in 2017 and 2018, both times demonstrating a remote exploit against Safari which also gained root or kernel-mode code execution on the underlying macOS system. Recently he has started offering trainings on browser exploitation in which he dedicates a full day to JIT compiler internals.