This year, I offered to run the crypto challenge at CarolinaCon X. I was offered the advice that very complex challenges were often met with frustration during the conference and it was requested that I make something that didn't require advanced mathematical degrees or a history of working with the NSA to solve ;)
With that in mind, Jaku and Ryan Linn were both very generous and offered to help me.
The below post is a writeup of the challenge, how it went, a solution, and some lessons learned. Don't scroll past the writeup header if you don't want spoilers.