We put some of your questions to Dr Mike Pound. Stolen Bitcoing Tracing - Ross Anderson: Feistel Cipher: AES Explained: Elliptic Curve Back Door: Parsing Explained: Data Analysis Learning Playlist: Secret Key Exchange (Diffie-Hellman): Professor Ross Anderson's Book: This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: Computerphile is a sister project to Brady Haran's Numberphile. More at