What course module is it? Is it on statitistics? if it is, then your advisor is probably more interested in how you apply the statistics to analyse your research problem (whatever it is). Yes, you must identify a suitable research problem to show that you have learned the skills (statistics or whatever) that you are supposed to have learned for your course. If the examiners are not familiar with crypto, you can bridge the gap by explaining and putting in information and showing how it connects to the course module.

I have a masters in maths as well as in education (instructional design and technology). Hit me up and feel free to ask if you have any questions.

Cheers!