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Secret services want to read people's communications, politicians talk about terrorists, but what's the reality of banning encryption? Ross Anderson, Professor of Security Engineering at the Computer Laboratory, University of Cambridge explains how history repeats itself.

The Dress:    • True Colour of 'The Dress' #thedress ...  
The VR Cave:    • The Virtual Reality Cave  Computerphile  
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Alan Turing and Enigma:    • Alan Turing and Enigma  

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This video was filmed and edited by Sean Riley.

Computer Science at the University of Nottingham: http://bit.ly/nottscomputer

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