[glitchc]

Cryptography: It's a niche field, not everyone offers a position in this area, but having a good grasp of the mathematics behind common cryptography techniques is a highly employable skill. Understanding quantum-safe algorithms is a huge plus.

Cryptographers tend to be one of two types: Those that create new algorithms and those that attack existing ones. The industry has positions for both kinds, it is up to your personal taste as to which appeals more.

[ginnungagap]

Thanks for your comment! Do you have any book or online lectures do suggest to get a taste?