Cryptocat is free software that aims to provide an open, accessible Instant Messaging environment that encrypts your conversations and works right in your browser.
pyCryptocat is a Cryptocat standalone chat client written in Python, using python-webkit package to serve Cryptocat JS and HTML files.
Cryptocat provides multi-user (and private) instant messaging inside chatrooms. It uses the OTR protocol for encrypted two-party chat and the (upcoming) mpOTR protocol for encrypted multi-party chat.
The goal is to provide the easiest, most accessible way to chat while maintaining your privacy online.
Install in BackBox Linux
sudo apt-get update
sudo apt-get install pycryptocat