Reply to comment
Information Hiding
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.
-
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. Download Full Lesson Plan and Student Worksheets.