I worked on a fun project involving knots once: https://arxiv.org/pdf/1004.5127.pdf https://arxiv.org/pdf/1004.5127.pdf This uses knots as a mathematical stru

I worked on a fun project involving knots once: https://arxiv.org/pdf/1004.5127.pdf https://arxiv.org/pdf/1004.5127.pdf This uses knots as a mathematical structure in a quantum cryptosystem. I tried to make the paper accessible without letting it get bogged down in irrelevant details.