Alfredo Ortega is a PhD candidate at ITBA (Instituto Tecnologico de Buenos Aires) and Exploit Writer at Core security. His specialty is unix exploit writing and low-level reverse engineering, wining contests like Ekoparty Reverse & Go Immunity challenge, and speaking in several high-profile security conferences. You may remember him from such security research as "OpenBSD IPV6 remote exploit", "Smartphone insecurity" and "Bios rootkits II: Son of the rootkit"