client side code:ĭocument.getElementById('clientCount'). Utilizing client’s side for the encryption purposes, Cryptocat 2 trusts and uses the already encrypted data on the server only. InnerHTML property so that the clients can display the number of connected users. Cryptocat 2 is an open source web application intended to allow secure and encrypted online chatting. On the client side, I have a socket event listener monitoring for this and when it's detected, updates a So I have on the disconnect event I have the server skim through all the rooms, and if it encounters a room name with a length of 4, it tells everyone in the room that the size of the room decreased by one. ![]() I assign custom, 4 digit rooms on each connect event. By some quirk, NodeJS is treating it like a normal array. Server io.sockets.once('connection', function(socket) can only be used for block statements and objects. Remove the event listener when the controller instance is destroyed If there's an ideal - and official - way to join and leave rooms that feels less clunky than this I'd love to learn about it.Ĭlient var roomId = ChatRoomData._id // comes from a factory After looking at a couple of questions I've put together something functional but most of the response linked are from people who admit they've hacked together answers and I've noticed there's a more general - and recent - discussion about the right way to do this on the Socket.io repo (notably here and here)Īs I'm such a novice I don't know if the work below is an acceptable way to do things or it just happens to incidentally function but will cause performance issues or result in too many listeners. As an alternative, nongovernmental organizations could set up their own Cryptocat servers, Kobeissi said.I'm trying to learn Socket.io by building a set of dynamically created chatrooms that emit 'connected' and 'disconnected' messages when users enter and leave. Tiny packages containing Raspberry Pis and the Cryptocat server software could also be sent to regions in need. He’s also planning to purchase some of the US$25-$35 Raspberry Pi mini-computers under development by the Raspberry Pi Foundation. There already is an add-on application for Google’s Chrome browser, and Kobeissi expects to release native applications for iOS and Android later this year. But remember, my goal is user-friendly 'security. More importantly it's a browser-based encryption. However, there is no way to password protect a chat room meaning anyone can join who can guess the room number. Kobeissi has plans for quite a few Cryptocat improvements. Crypto Cat seemed like the perfect solution. ![]() By using a “.onion” URL for Cryptocat, the Cryptocat server will not know the users’ true IP addresses, Kobeissi said. A user creates a chat session, picks a nickname and then types a random string of characters in order to generate the 256-bit AES encryption keys for the public key cryptography system it uses.Ĭryptocat’s code is open source, and Kobeissi has published details on how its encryption works in order to get feedback from other cryptology specialists.Īs an added security measure, Cryptocat is compatible with TOR (The Onion Router), a worldwide network that make web surfing more anonymous by randomly routing traffic through its servers. ![]() First, one of its versions is web-based, so no application has to be downloaded. The beauty of Cryptocat is its simplicity. OTR must be downloaded, installed and configured, and both parties having a conversation must have it enabled in order for the messages to be encrypted. There are proven encryption technologies for instant messaging, such as PGP (Pretty Good Privacy) and OTR (Off The Record), an add-on encryption program for IM applications such as Pidgin and Adium.īut PGP can be “difficult to use for people who aren’t computer geeks,” Kobeissi said. Messages are encrypted when transmitted, but those conversations are decrypted on the servers running those services, potentially allowing interlopers to record them. ![]() Many of those applications implement SSL (Secure Sockets Layer), an encryption protocol that underpins e-commerce transactions.
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