[cycrutchfield]

That’s a rather restrictive definition of cryptography, don’t you think?

[gitgud]

Well yes strictly speaking it's not just math, but usually it does imply math.

What are some examples of cryptography without math of some kind?

[arpa]

Character substitution comes to mind, as described in https://en.m.wikipedia.org/wiki/The_Adventure_of_the_Dancing...