As a former hacker, Ýmir argues that our main hope to improve cyber security is for all of us to adopt the attacker’s mindset and understand how hackers break in. Ýmir is a professor, hacker, and entrepreneur. With his students at the SimBioSys lab at Emory University, he performs research into large-scale distributed systems (how should we build large systems?), cybersecurity education (how do we make the world more secure?), and data science (how do we exploit data to monitor epidemics?)