I took a PDF of a government specification and turned it into a full code implementation that can be used just by installing python -- do you want to encrypt your own files? hold your local business hostage? experiment with password cracking on a standard known to be "solvable"? The possibilities are endless!!!

How to use:

Install python 3 if necessary

Run: "python main.py" with a file named default.txt in the same directory as the script

This file will be encoded/decoded and the script outputs a file, output.txt

SHA-1 deprecation and removal is as follows:

July 14th, 2026: Brownout. We will run a brownout from 00:00 to 18:00 UTC that will disable SHA-1. The brownout will not impact CDNs.

September 15th, 2026: SHA-1 in HTTPS / TLS will be completely disabled for GitHub and partner CDNs.