I've considered it but the overhead on the server side would be too much for the ad-free (ad's = loss of privacy IMO) and non-monetized vision I have. I use diffie-hellman to distribute an encrypted master key to each client that is used initially for the chat. I'm going to tell users not to consider that private (I can certainly man in the middle it from the server as I'm the one who generated the key) but they can use that key to discuss what private key they will use and then enter it manually (my brown dog's name + my birthday with only the first letter of my last name capitalized for example). In that master key I sent earlier there is also a salt to add to the hash of the password they select so even if the key they pick is weak it still might protect them. Everything is wrapped up in AES256 thanks to the Stanford Javascript Crypto Library.

I may use openpgpjs down the line for private messages within rooms. I also want to experiment with WebRTC for private messages and maybe offer some opportunistic peer to peer connections but I haven't gotten the far yet.