This is a simple chatserver that uses server-client RSA key based authentication. I added dynamic keypair generation for server and clients (on startup each generates 4096b long key) and exchanges public keys when connected. This way there is no need to create encrypted keys for clients and server.

To be sure that communication really is encrypted, you can use wireshark, or git pull the repo and edit server.py part where messages are recieved and print them.

git clone https://github.com/lunemec/python-chat.git
pip install -r REQUIREMENTS.txt

python server.py listen_ip listen_port

python client.py username server_ip server_port

Cloned this code from https://github.com/lunemec/python-chat and fixed some missing parenthesis in print calls. Otherwise, I have not change anything. Note from original author:

I found a simple chatserver recipe on the internet with some bugs. I fixed most of them, added a encryption and message signing. If there are some bugs, you can report them to me, but no promisses :)

If anyone would like to use it, you do it on your own risk. Maybe in future I'll get back to it and make this software easier to use.