These notes and exercises are part of the Secure Communications module on the Digital Forensics and Cyber Security course at Technological University Dublin.

Lab 1A - Decoding Classic Ciphers
Lab 1B - Code Breaking Challenge
Lab 2A - Simplified OTP
Lab 2B - Numbers Station Challenge

Lab 3A - Introducing Git & GitHub
Lab 3B - Commandline Cipher Challenge
Lab 4A - Introducing Pycharm Edu
Lab 4B - Python Ciphers Challenge

Lab 5A - Introduction to Hashing
Lab 5B - Breaking Salted Hashes Challenge

Lab 6A - Python Challenge - Simple Hash Chains
Lab 6B - Python Chgallenge - Credit Card Verifier

I'm running all labs on Kali 2020.1 So you should have the latest version of Kali installed to follow along, but any current Linux distro should be fine also. While some of the labs can be easily run on Windows you are better in the long run creating a Linux VM and using it for all of the labs.