Elie Bursztein is a researcher at the Stanford Security Laboratory. His research is on computer security and applied cryptography with a specific attention to web, game and mobile security. He holds an engineering degree and a Ph.D in computer science Elie's research combines the advances in machine learning, cryptography, data mining and HCI to create more usable and secure systems. Lately, he has been working on improving CAPTCHA security and usability . He is also developing a Chrome extension for safer and more private browsing. Elie blogs at http://elie.im/blog and tweets at @elie.