David Rook works as a Security Analyst for Realex Payments in Dublin. He's an author of the OWASP Code Review Guide and contributes to several other OWASP projects including the browser security framework working group. He has presented at several conferences including OWASP Ireland chapter meetings. David is a member of the OWASP Ireland board and the Irish Internet Association Web Development Working Group helping to publicize web application security within Ireland. In addition to his work with OWASP and the IIA, he has his own security website and blog which can be found here: www.securityninja.co.uk/blog. He has also had articles published in (in)secure magazine. More recently he has found security flaws in the Facebook website and provided guidance to them on how to fix the flaw.