Computers are often used to store private information, and we often want to share parts of it without giving up our full privacy.
This activity shows a surprising technique discovered by computer scientists that seems impossible; it allows people to share personal certain kinds of information accurately without having to give up any privacy at all.
Activity description (PDF)
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Related Resources
- More activities and lessons:
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- The Mathmaniacs web site has a similar activity (lesson B).
- Try Engineering has an activity called Electric Messages: Then and Now which explores electronic communication, the Morse Code system, and advances all the way through text messaging. Students build a simple circuit, send messages to one another. and explore the impact of electrical communications on society.
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- If you want to find out more: