I should have posted this before.
I keep forgetting how small the cryptography space is. If I am not wrong, one or two of the people that made this have worked with or for the foundation at some point. (but I might be wrong)
These people are pretty legendary. Have fun with the challenges. (and no I haven’t manged to do them all. I have done a lot though.) have you @str4d? [please go easy on me, heh.]