Prompt cryptochat/messenger with web interface

Question

Cryptography

Maybe someone will tell you a chat service with encryption in the browser?
It is desirable that the key is also not transmitted in the clear over the network, but is negotiated by the Diffie-Hellman algorithm.
It is also desirable to have HTTPS.

Answer 1

Why don't you like Crypto.cat? The fact that he is actually a plugin?
Because otherwise everything is in place, and the browser, and open source, and a pretty decent audit (by the standards of crypto chats in general)

Answer 2

Once upon a time there was firetalks.com/ru
True, the HTTPS certificate is somewhat outdated. I don’t know the implementation features, but the source codes are available - you can always finish it)
There are several mentions on Habré: habrahabr.ru/search/?q=firetalks

Answer 3

The reliability of such online services is a big question, because the service itself can issue one code to the audit and issue a code with its Trojans to selected clients.
Here you can only talk about a proven desktop application (or even a locally saved html application). Or at least a browser extension.