Chinese hackers are believed to have attempted to penetrate India’s most sensitive government office in the latest sign of rising tensions between the two rival Asian powers, The Times has learnt. M. K. Narayanan, India’s National Security Adviser, said his office and other government departments were targeted on December 15, the same date that US companies reported cyber attacks from China. “This was not the first instance of an attempt to hack into our computers,” Mr Narayanan told The Times in a rare interview. He said that the attack came in the form of an e-mail with a PDF attachment...