Goal: Share a secret key

How to play:

  • Put coins in the bag by using the "Add" button. A related (encrypted) number appears on the outside of the bag.
  • The "Load" button takes the value on the outside of another team’s bag and loads the contents of that bag into "their bag".
  • Only the application knows the relationship between the number of coins in the bag and the displayed number.
  • Teams may communicate through call or through the chat, but anything spoken or exchanged between teams is seen and/or heard by the adversary.
Goal is achieved by getting the same number of coins in both bags.

Our bag


Their bag