Hi Rohit,
You should have uploaded any kind of paper regarding your chosen topic, no one can suggest you by just reading the name of any project. And before you asking you should have read proper documents regarding any project.
For network security project, search and read journals on network security, you will come to know about some good topic and ideas, and for deciding wheather ANY project will be good or bad, you will come to know after reading papers about those topics.
For choosing the topic, go through some basic steps,
1. Try searching and reading journals regarding your domain(i.e. Network security).
2. Find what work have been done in your selected topics .This is important before you select any topic.
3. Find future work related to your topic, i.e. what things you can implement in your topic.
Thanks & regards,
Vishal salve.