In the cyberspace, hackers from China and Pakistan pose a major threat to the country. Many cyber attacks in recent months were traced back to Chinese IP addresses, a security expert said.

The issue of cyber war came to the light following hackers, suspected to be from mainland China, making intrusions into secure computer systems of the Ministry of External Affairs.

Hacking groups from China and even Pakistan is very active in India, Tarun Wig from Appin Technologies said.

"Post Godhra riot, a hacker group from Pakistan—Gforce -- had defaced the website of the Gujarat government to post their own message," he said.

Hackers usually wreck into a system either to prove their might or to get confidential information.

Recently, a hacker from a European country had hacked India's Ambassador to China Nirupama Rao's official e-mail. On questioning, he had said that his intentions were only to show how weak the computer systems in India were.