Board-Cord stores only what's needed to run games: server/channel IDs, player IDs, and game state (ship placements and shots) for your active and finished games. Ship placements are shown only to the player who placed them until a game ends. The web dashboard signs you in through your Rival Eclipse account and reads your Discord username, avatar, and server permissions to confirm you manage a server; it stores none of that beyond your session. Data is backed up encrypted and deleted on request via Rival Eclipse.