Ariel Waissbein joined Corelabs at Core Security Technologies in 1999. During 1999-2002 he worked on a new public-key cryptographic scheme, he discovered cryptographic attacks to popular software products such as SSH and MySQL and designed a cryptographic attack method against polynomial-based public-key schemes. In 2003-2004 he worked in digital rights management projects and developed a provably secure software protection method. Since 2004 he leads a research group which has been tasked with web-application and end-point security and penetration testing. This group has designed a security and privacy enforcement system for web applications called CORE GRASP (see http://grasp.coresecurity.com), a static analysis vulnerability detection scheme and has collaborated in a new web-application penetration testing platform. Since 2005 he co-leads the Computer Security program in the Ph.D program at ITBA university where he still teaches. Papers and presentations: see http://community.corest.com/~wata/ for a complete list.