Good examples all. Here's my slides, if anyone is interested:
http://www.subspacefield.org/security/math_rules_cyberspace_20101113/ You might appreciate the side-by-side of Whitfield Diffie and Gandalf the White (a striking similarity), as well as the discussion of what I call "The Manhattan Project Cipher" which I've only ever seen described in "The Codebreakers". I played a bunch of motivational videos up front, gently easing them into encrypting, and then some math, some more encrypting, and finally OTPs. Didn't get to Playfair or Enigma. ZKPs and RSA and D/H would have been fun, but I didn't have time in 110 minutes, and I was concerned I'd lose the middle school kids. It didn't seem to matter; based on hand-raising, most students rated it about a 8.5/10. PS: I'm half-tempted to throw together some kind of "discrete math concepts for aspiring cryptographers with computer science backgrounds" web page one day, if there isn't something out there like it already. -- Good code works on most inputs; correct code works on all inputs. My emails do not have attachments; it's a digital signature that your mail program doesn't understand. | http://www.subspacefield.org/~travis/ If you are a spammer, please email [email protected] to get blacklisted.
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