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Hello Naveen,
You should not get too fascinated with ethical hacker as they show in movies. Most of the institutes provide just a basic fancy course under the name of ethical hacking, just to attract students and earn more.
Hacking itself is illegal. No companies hire hackers to steal information, as it would land them in serious legal issues.
I would rather recommend you to go for security specialist professionals. These jobs are highly payable and in high demand as most companies need them to protect their own data.
This requires knowledge of Computer Networking. As you've mentioned that you will be opting for Software Engineering, I would suggest you to opt for Security Specialist course during or after your third year of engineering, as by then, the basics required for Security Specialist course would have been covered in your engineering syllabus.
You can go to some reputed computer training institutes like NIIT, etc. You can go for Java courses followed by networking courses and CCNA/CCNB (CISCO) courses. After this, you can also opt for CEH (Certified Ethical Hacker) certification courses, if you wish to.
I hope it helps.

IMS Learning Centre has been nationally preparing students for entrance tests at all levels since 1977. It has been a constant endeavor of the centre to offer a successful career to candidates who either want to pursue MBA in IIMs through the CAT/XAT/MAT test or others who want to secure an employment in the public sector banks through or other government departments by appearing for exams like IBPS PO, IBPS Clerical, SBI PO, SBI Clerical, SSC CGL, RRB, IBPS RRB, IBPS Specialist Officers, etc. And I'm from Assam, IMS-Guwahati is the best coaching institute having a dominating presence in Guwahati with two centres. IMS Guwahati comprises of a team of mentors who are alumni of premier institutes like IIM-Ahmedabad, IIT-Bombay, XLRI Jamshedpur, etc. The centre has produced all India toppers in all India based competitive exams like CAT MAT & XAT. Over 600 students have successfully secured jobs through various bank exams and other government exams like IBPS PO, IBPS Clerical, SBI PO, SBI Clerical, RBI, SSC CGL, and other exams for government jobs after coaching in IMS Guwahati centre. Well researched study materials, personalised mentoring and online learning resources are hallmarks of our training programs, making IMS Guwahati the best coaching institute of Assam. And you know IMS Guwahati has excellent results by students in CAT 2017. Students selected in IIM Ahmedabad, IIM Calcutta, IIM Lucknow, IIM Shillong, IIM Kozhikode, IIM Indore, IIM Ranchi, IIM Trichy, IIM Udaipur, IIM Rohtak, IIM Sambhalpur, IIM Raipur, IIM Kashipur, MDI Gurgaon, S. P Jain, NMIMS, etc. Once again the best results in the northeast from IMS Guwahati. Students from Gauhati Commerce College, K. C Das Commerce College, Cotton College, AEC, GIMT, Tezpur University, GU-IST, Handique Girls College, Dhemaji College, Dibrugarh University, NIT, Darrang College, etc. Have secured seats in the top 20 MBA institutes of the country. So I don't think that IMS learning centres are not good actually they are the top institute's centres in India which I have mentioned one of the best coaching centres of IMS from my state that is IMS-Guwahati.