Unfortunately, there's a thing called Lawful Interception [1]. It's a requirement for telecom companies, not only in India but even in western countries. What DoT is doing is asking BBM to adhere to this. This also the reason why VoIP and Skype are still not allowed in India.
The real issue here is the misinterpretation of this requirement. Lawful interception methods can be easily be circumvented and it does not make sense to apply it everywhere.
The real issue here is the misinterpretation of this requirement. Lawful interception methods can be easily be circumvented and it does not make sense to apply it everywhere.
[1] http://en.wikipedia.org/wiki/Lawful_interception