Peggy knows a secret password. Victor wants proof she knows it...
...but Peggy refuses to tell Victor the password. Not now, not ever. Is there any way to convince Victor without revealing anything?
The Cave Challenge: Try It Yourself!
There's a ring-shaped cave with a magic door in the middle. The door only opens if you know the secret password. Peggy (P) wants to prove she knows it to Victor (V) without telling him what it is.
Does Peggy really know the password?
Step 1: Victor waits outside. Peggy enters and picks a random path.
How can Peggy prove she knows the password without ever revealing it?
Try the cave demo above or select an answer to continue!
