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RSA
The travelling salesman
How do you create dramatic film out of mathematics? We find out with writer and director Timothy Lanzone.
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Safety in numbers
Today's digital world with its free flow of information, would not exist without cryptography to guarantee our privacy.
Plus
meets mathematician, author and broadcaster
Simon Singh
to find out about the science of secrecy.
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Terrorists' code of honour
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Sarah's cracking algorithm
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