Classroom mode
Run it in class
Can two friends build the same hidden number while a listener copies every public card?
Show of hands — before you project anything
Why is the modulo-17 clock useful for learning even though it is not a security recommendation?
- A Way more than you'd guess
- B About what you'd guess
- C Way less than you'd guess
Count the votes out loud. Hold them to it — then watch.
Project it (fullscreen)
Discussion prompts
- Why is the modulo-17 clock useful for learning even though it is not a security recommendation?
- What is different about a passive listener and an active middle party?
- Why do approved group structure and parameter size both matter?
Where it shows up in real life
- A browser and website establishing fresh session keys
- A messaging protocol agreeing on ephemeral keys
- Secure tunnels that authenticate peers before carrying private traffic
A prediction-first worksheet — no answer key.
zero prep · no login · any projector
Winding down at home? Family mode ·
Explore every question
Can two friends build the same hidden number while a listener copies every public card?
Predict — what do you think will happen, and why?
Talk about it
- Why is the modulo-17 clock useful for learning even though it is not a security recommendation?
- What is different about a passive listener and an active middle party?
- Why do approved group structure and parameter size both matter?