Moti Joseph has been involved in computer security. In the last few years he has been working on reverse engineering exploit code and developing security products. Moti has been speaking at Black Hat Las Vegas 2007, CONF2009 & CONF2010 in Poland, POC 2009 & 2010 in South Korea, ShakaCon 2009 in USA, CHINA 2011 at Shanghai Jiao Tong University, NopCON 2012 in Istanbul and SysCan2010 Taiwan, Taipe.
Also, Moti's work is so secret, he never publishes anything.
Twitter: @gamepe