People were concerned about the https://diceroll.games/ server being able to learn the results and potentially impersonate a player, so all of the clients now perform an N-way Diffie-Hellman shared key derivation that they then use as a symmetric session key for end-to-end encrypted dice games.
some cautions players were concerned that their enemies might be in collusion with the server, which would allow them to spoof messages of the honest players. so now all traffic is signed with ephemeral ecdsa keys. and chat is back. https://github.com/osresearch/diceroll-games/commit/359be6d6bbd88f4c2a8c10003f49d7025de783b6
https://diceroll.games/ e2e encrypted chat comes along for free once all of the other crypto bits are there, so I added an input box to let you tell the other player when you're waiting on their roll.