Sebastián Castro (@r4wd3r) is the R&D Leader at CSL Labs. Born in Bogotá, Colombia, has been an information security researcher, network & application pentester and red-teamer for 6 years, providing cybersecurity services to global financial institutions and local defense government organizations. This guy has presented at national and international conferences, such as BSides, ISC² and recently Black Hat, exposing password cracking and Windows security own research. Sometimes a tenor, sometimes a hacker, Sebastián also works as an opera singer at the Opera of Colombia Chorus, participating on many national and international fancy performances with well-known singers whose names he can’t even spell.