Elie Bursztein is a postdoctoral 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 from EPITA and a Ph.D in computer science from the ENS-Cachan. 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 many security related software including Webseclab an online environment to teach web security, WebShield a Chrome extension for safer and more private browsing and OWADE a windows forensic tool. Elie blogs at http://elie.im/blog and tweets at @elie.