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Video Description
The psychic paper in the TV show "Doctor Who" displays whatever the Doctor needs it to show at any given time. The Java vulnerability Neil Madden exposed is a digital version of this. Dr Mike Pound explains.

Neil Madden's blog:

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