Math EE - about cryptography

[Xunn]

Hi everyone! 

I am working on choose the topic for my Math EE, and I wanna write about cryptography.

So here is the topic I think about, but I don't know if it can work well or not.

• The weakness of RSA, and give an specific example or show how to crack it.
  • Talk about how it work
  • The math behind RSA
  • Is is still be using by people or not?

I wonder if I can only write about one specific type, like what I said above. 

If yes, may you help me with some good ideas of the research question? Thank you soooo much!!! I am not very good at English so if there is any grammar mistakes above I am sorry for that(；д；).