The degree of loss is being investigated, said the officials adding that it would be “premature at this stage" to comment on the sensitivity of the compromised data. Officials also stated that at least six mid-level officers had been accused for procedural lapses which had led to the breach.

Ankit Fadia, an independent Indian computer security consultant told to the Global Times that all governments globally are building an army of "ethical hackers" whose job is not only to protect their country's government official servers but also hack into other countries’ official systems and seize confidential documents.

"This is something that the US government, Chinese government and even the Indian government have been doing for many years now," Fadia continued. "The Indian government servers have been repeatedly attacked by Chinese hackers. Indian Government needs to take cyber security more seriously and improve the security of critical government systems. Regular security audits must be done and government officials need to be trained properly as well," said the consultant.

Two years back, Indian media have already accused that Chinese hackers are breaking into top secret files of the Indian Defense Ministry as well as of the other embassies across the world. It was in March this year that a Tokyo-based computer security firm reported of a former graduate student at a Chinese university who had hacked Indian military research bodies.

In the month of June, ESET Security had discovered another virus, which was designed for industrial espionage that targets and steals files running AutoCAD software, and sends them to e-mail accounts located in China.

However, Li Wei, director of the Institute of Security and Strategic Studies with the China Institutes of Contemporary International Relations, told to the Global Times that they have dismissed India's speculation.

"India's Internet security and software industry belong to the world's leading class. Its hacker defense ability is better than that of China. The accusation against China is not that credible," Li affirmed. "Meanwhile, hackers' IP addresses can change, which cannot be used as evidence of where the hackers come from. That's also why hackers are difficult to trace."

Li also believed that some Indian media were speculating against China. And he said that it could not necessarily affect the prevailing Sino-India relationship.