It'd be nice is encryption fell under the 2nd amendment. It's been classified as a munition before, and with the creation of USCYBERCOM, the govt has a vested interest in ensuring that it's citizens have experience using encryption software.
On top of that, we now have years of SCOTUS jurisprudence that "arms" are absolutely subject to _some_ regulations, with the debate focusing on what "some" actually means.
Maybe you were looking for someone notable, but I'll make it for you right now.
I suppose such an interpretation would have the side effect of making literally any hazardous substance legal to possess.