Yes the tutorial is open source on the nostr:nprofile1qqswhf7zkyg69ragul9s0udwplh0fyx5nkyhh4a3ldwwt5ls6eeearcprpmhxw309ucnswpwxycnwt3jxshryve48g6rsdpcqye8wumn8ghj7mrwvf5hguewwdshgmmndp5hx6t8deskctnrdakj7mn0wd68yun9d3shjt63x3fyu6n9wdes2aaus4 repo with text as .md and pictures in webp available.
https://github.com/PlanB-Network/bitcoin-educational-content/tree/dev/tutorials/computer-security/bitchat
