Zig Zag Decryption Explained - Computerphile

XOR encryption is flawed. Professor Brailsford explains the zig-zag method that can reveal the precious key stream.

Fishy Codes – Bletchley's Other Secret: https://youtu.be/Ou_9ntYRzzw
XOR and the Half Adder: https://youtu.be/VPw9vPN-3ac
Colossus & Bletchley Park: https://youtu.be/9HH-asvLAj4
5 Hole Paper Tape: https://youtu.be/JafQYA7vV6s

The Professor's Supporting Documents:

Sean/Dave ZigZag document: http://bit.ly/computerphileZigZag
C Program to play with: http://bit.ly/ComputerphileZigZagCprog
The real life decryption: http://bit.ly/ComputerphileTiltman
Teleprinter codes: http://bit.ly/computerphile5holetape

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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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