This is extra footage from Tom Rodden on tracking cookies and some of the controversy surrounding digital data.
Video filmed and edited by Sean Riley.
Computerphile is a project by Brady Haran. See the full list of Brady’s video projects at: http://periodicvideos.blogspot.co.uk/2012/06/here-are-my-channels.html
Computer Science at the University of Nottingham: http://bit.ly/nottscomputer