Nahuel Grisolía is a security guy from Argentina. He has delivered trainings in a couple of conferences around the world: BugCON (Mexico), H2HC (Brazil), Ekoparty (Argentina), OWASP events (Argentina), etc.
Paul Graham is an English programmer, essayist, and investor. In 1995, he and Robert Morris started Viaweb, the first software as a service company. Viaweb was acquired by Yahoo in 1998, where it became Yahoo Store. In 2001 he started publishing essays on paulgraham.com, which in 2011 got 17 million page views. In 2005 he and Jessica Livingston, Robert Morris, and Trevor Blackwell started Y Combinator, the first of a new type of startup incubator. Since 2005 Y Combinator has funded over 450 startups, including Dropbox, Airbnb, Stripe, and Reddit.
Michael Boelen is the author of Rootkit Hunter, an open source rootkit scanner that runs mostly on Linux and BSD distributions.
Nikita Tarakanov is a independent information security researcher who likes writing exploits especially for Windows NT Kernel. He won PHDays Hack2Own contest in 2011 and 2012. He also tried to hack Google Chrome during Pwnium 2 but failed.
Alexey Tyurin is a Russian pentester who is one of the leading developers of ERPScan Pentesting tool. In many of the systems he analyzed like SAP, VMware, and Citrix, he has found 0-day vulnerabilities.
Alexey Sintsov is a Russian infosec enthusiast and one of the co-organizers of ZeroNights conference. He got his fame by finding numerous 0-day vulnerabilities in the software of giant vendors like SAP, VMware, IBM, Adobe, Google as well as in Russian remote banking systems, thus inflicting great horror and shame over the Russian infosec field.
Andrei Costin is a Computer Science graduate of the Polytechnic University of Bucharest where he did his thesis work in Biometrics and Image Processing. While starting out his IT-career in the Computer Games industry, he has worked in the Telecom field and also was a senior developer at a specialized firm programming various GSM/UMTS/GPS sub-systems. He is known as the "printer guy" for his "Hacking MFPs" and "Hacking PostScript" series of hacks & talks at various international conferences.
Vladimir Vorontsov is the founder and lead analyst of ONsec. Vladimir has been engaged in research in the field of web applications security since 2004. He is the CEO and lead expert of the ONsec company as well as the author of numerous researches in the field of web application security. He was awarded by Yandex for winning the "vulnerability search month" contest, by Google for Chrome vulnerabilities, by Trustwave for ModSecurity SQLi Challenge, by 1C Bitrix for competition on proactive defense bypass.
Atte Kettunen is a security researcher at the Oulu University Secure Programming Group (OUSPG). In 2011 and 2012 he has successfully fuzzed Firefox and Chromium and found dozens of vulnerabilities in them.
Andrey Belenko was born in Moscow in 1984. He graduated from Moscow State Technical University in 2007 (M.Sc. in Computer Security, with honors). He was the first to bring GPU acceleration to password recovery; have co-developed ThunderTables, an improvement to Rainbow Tables.