First off, why our Indian Army is not using encrypted and signed emails? Secondly, they are noticing China and others only now? With all the conspiracy theories out on the Internet, there are many other countries interested in covertly gaining information about other countries, even 3rd world country like India. Ever think about the great innovation of GPS and who owns it? and to think that almost every Indian owns a cell phone in their family, which is GPS enabled. How difficult would it be for US army, navy, CIA to track down a key Govt or amry/navy official to his/her position?
For another example, are we really policing our visitors? How easy it is for an American to get a visa and land in India without his/her back ground being checked.
If we as a Nation have to survive in the midst of US/China/Pakistan/Japan, we need to be more intelligent than our enemy. We should know about it, as one of the earliest documents which talk about covert operations was written in India, Arthashastra.