A Stick Figure Guide to the Advanced Encryption Standard (AES), YouTube documentary (in Swedish) on Arne Beurling and the Geheimschreiber/G-skrivaren, illustration of MD5 collision by flame . 24/09/12: web security, guest lecture by Patrik Karlsson and Martin Swende, read OWASP Top 10 web application security risks, XSS OWASP video , lecture