Verifiable deck

The “Deck verified” badge at the table means every hand can be checked: the cards can't be swapped once the hand has started.

1. Before the hand, the table shows a fingerprint (SHA-256 hash) of the server's secret seed.
2. Your phone adds its own random seed — one the server can't know in advance.
3. The deck is shuffled from the server seed and the players' seeds.
4. After the hand the seed is revealed and the game checks it itself: the fingerprint matches, and the cards on the table and in your hand are the same.

Tap the “Deck verified” badge to open the explanation and a page with your hands from the last 30 days. It also has the formulas to check everything yourself, outside the game.