character: Claude Shannon
topic: Foundations of modern cryptography during WWII
grade: 9
subject: Computer Science
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character: Alan Turing
topic: Contributions to cryptanalysis during WWII
grade: 9
subject: Computer Science
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character: Whitfield Diffie
topic: Public-key cryptography and its implications
grade: 9
subject: Computer Science
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character: David Chaum
topic: Pioneering work in digital cash and privacy
grade: 9
subject: Computer Science
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