If you are keen on Hacking and want to land in a good job, especially in Police / Intelligence, go for M.Sc. (Cyber Forensics and Information Security).
This course is available only at 5 places in India. You can get a job in Police or Intelligence Agency as an Ethical Hacker and whatever you shall do will be legal with respect to your job.
One of the 5 places in India offering this course is University of Madras.
-Chief Administrative Officer.