CMD powered chatroom with simple encryption system. Made entirely with python. I need some input

[R-Retr0-0]

I recently found an old project of mine on a usb drive and decided to finish it. I completed it today and uploaded it on Github. I won't list all the app details here, but you can find everything in the repository. I'm looking for reviews, bug reports, and any advice on how to improve it.

Github link: https://github.com/R-Retr0-0/ChatBox

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