I have two years penetration testing experience. I have completed my Bachelors in Information Technology(B.tech).
I want to become a cyber security expert and interested in digital forensics. Is it a wise choice to do masters in Cyber security and digital forensics or equivalence or is it better to choose Masters in computer science and then select any elective in security?

So, what is the best masters course for my requirement ?
And, What are all some best universities to pursue it ?
I am planning to take my GRE by Jan 2017. So is it good to apply for fall or spring?