Computers & IT (Non-Engg)

Yes, why not.
End of the day, interest in specific field matters. ECE students understand the hardware which becomes a + point for a cyber background. Start by learning the basics of networks and network security. Certifications like CCNA Security, Network + will help you to understand the basics. Once you are done with this then learn scripting basics if interested and get hands-on with Linux/Windows OS as much as you can. With this knowledge you will be able to study and get certified as a CEH (Certified Ethical Hacker). Cyber Security is a very vast term and there are so many avenues within that you can master and make it your expertise.

Dear Bharat,
B.Tech is a better option as it is a professional degree/ course, whereas, B.Scn and BCA are not professional but are simple/ regular degrees. These days we have many branches available for B.Tech. Some of them are there for long like ECE, CSE, EE, Mech., Civil, etc. But with the passage of time, the impact of technology has increased due to which many new branches have come up like Biotech, Food Tech., Nanotech, Agri., Mechatronics, etc. Many reputed private universities are offering these B.Tech specializations. They have different criteria for admissions. Some offer admission on the basis of JEE scores, some offer admission on basis of their own tests and some offer admission on the basis of both. Some even offer direct admission on basis of class 12th marks. Some of the universities also offer scholarships on basis of your performance in class 12th or JEE or their own tests. You can check the details of any of the reputed universities like VIT, Lovely, SRM, etc. All these universities have wonderful infrastructure and world-class facilities to offer to students apart from good placements.
Good luck.