I get it, sometimes you just do something for the challenge.
It’s really great what you can accomplish when you know a little more than the bare minimum of the tools at your disposal (^^,)
And I had the same experience after learning a bit more about awk for the fist time, hahaha.
Remember: militaries usually buy from the lowest bidder, so anything military-grade is probably low quality.
Also, email isn’t a great medium for communicating securely, since the other party has to be just as mindful about security as you; otherwise it’s basically security theater.