Hi, I am wondering whether you have a list of proposed titles of the thesis and need to choose one? In this case it is easier to decide what it should be. I received such lists for the bachelor and master degree, but probably it is different in your country.
What is easy for someone else could be difficult for you, it depends on the competence, interests, etc...
For example about the computer viruses, do you like such idea?
Kind regards,
Rossi