diff --git a/src/Game.hs b/src/Game.hs
index 6009c15..fb7a390 100644
--- a/src/Game.hs
+++ b/src/Game.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE NamedFieldPuns #-}
 module Game (
       export
     , new
@@ -8,13 +9,15 @@ import qualified App (T, update)
 import Control.Monad.Except (runExceptT, throwError)
 import Control.Monad.Reader (lift)
 import Control.Monad.Writer (runWriterT)
-import Data.Map (mapWithKey)
+import Crypto.Saltine.Core.Sign (signDetached)
+import Data.Aeson (encode)
+import Data.Map ((!), mapWithKey)
 import qualified Hanafuda (empty)
-import Hanafuda.KoiKoi (Game, GameBlueprint(..), GameID, Mode(..), PlayerID)
+import Hanafuda.KoiKoi (Game, GameID, Mode(..), PlayerID)
 import qualified Hanafuda.KoiKoi as KoiKoi (
-    Action, Move(..), play, new
+    Action, Game(..), Move(..), play, new
   )
-import Hanafuda.Message (PublicGame)
+import Hanafuda.Message (PrivateState(..), PublicGame(..), PublicPlayer(..), PublicState(..))
 import qualified Hanafuda.Player (Player(..), Players(..))
 import qualified Server (register)
 
@@ -22,16 +25,35 @@ new :: (PlayerID, PlayerID) -> App.T GameID
 new (for, to) =
   Server.register <$> (lift $ KoiKoi.new (for, to) WholeYear) >>= App.update
 
-export :: PlayerID -> Game -> PublicGame
-export playerID game = game {
-      deck = length $ deck game
-    , players = Hanafuda.Player.Players $ mapWithKey maskOpponentsHand unfiltered
+extractPrivateState :: PlayerID -> Game -> PrivateState
+extractPrivateState playerID game = undefined
+
+extractPublicState :: Game -> PublicState
+extractPublicState game = PublicState {
+      mode = KoiKoi.mode game
+    , scores = KoiKoi.scores game
+    , month = KoiKoi.month game
+    , playing = KoiKoi.playing game
+    , winning = KoiKoi.winning game
+    , oyake = KoiKoi.oyake game
+    , river = KoiKoi.river game
+    , step = KoiKoi.step game
+    , trick = KoiKoi.trick game
+    , rounds = KoiKoi.rounds game
   }
+
+export :: PlayerID -> Game -> App.T PublicGame
+export playerID game = do
+  secretKey <- asks $ fst . keypair . mServer
+  return $ PublicGame {
+        playerHand = hand $ players ! playerID
+      , privateState = extractPrivateState playerID game
+      , publicState
+      , publicSignature = signDetached secretKey publicState
+    }
   where
-    Hanafuda.Player.Players unfiltered = Hanafuda.KoiKoi.players game
-    maskOpponentsHand k player
-      | k == playerID = player
-      | otherwise = player {Hanafuda.Player.hand = Hanafuda.empty}
+    Hanafuda.Player.Players players = KoiKoi.players game
+    publicState = encode $ extractPublicState game
 
 play :: PlayerID -> KoiKoi.Move -> Game -> App.T (Either String Game, [KoiKoi.Action])
 play playerID move game = lift . runWriterT . runExceptT $
diff --git a/src/Messaging.hs b/src/Messaging.hs
index a2b1647..c592c14 100644
--- a/src/Messaging.hs
+++ b/src/Messaging.hs
@@ -73,4 +73,5 @@ update = Update {alone = [], paired = []}
 notifyPlayers :: KoiKoi.Game -> [KoiKoi.Action] -> App.T ()
 notifyPlayers game logs =
   forM_ (keys $ KoiKoi.scores game) $ \k ->
-    sendTo [k] $ Game {game = Game.export k game, logs}
+    game <- Game.export k game
+    sendTo [k] $ Game {game, logs}