u/awkwardness_maxed

I am an undergraduate student in Mathematics from India and preparing for entrance examinations to master in Mathematics. I was looking for some careers in industry that are math heavy and are intresting to work in. That's when I found out about cryptography. For people working in private and government firms, what exactly do you do and what kind of mathematics do you use? The main thing is that I wanted a career where I can utilise Mathematics for actual stuff. Academia is good but boring and a permanent position takes too much time (PhD + multiple postdocs). Also, what is the scene of this field in the next few decades? What do you need besides mathematics to work in this field?