Ask HN: Recommendations for a security focused university project

I'm considering working on my final university project before my thesis. I'm studying Software Engineering (Bachelor of Science)

I want the project to revolve around security but I'm having trouble coming up with ideas/concepts that don't have established implementations.

Some of my interests are: Linux, Embedded applications / IoT, Reverse Engineering, Static Analysis, Web Backend,

Also open to other topics, besides crypto.

Thanks in advance