I also had a similar idea a few years ago for a CTF challenge, coming at it from a "modern Caesar cipher" perspective: https://laurencetennant.com/unicode-shift

I also had a similar idea a few years ago for a CTF challenge, coming at it from a "modern Caesar cipher" perspective: https://laurencetennant.com/unicode-shift-cipher https://laurencetennant.com/unicode-shift-cipher Also a crude "modern Bacon cipher" using Punycode characters as the B's and ASCII-range characters as the A's.