RIM Blackberry Update
It was reported on 14/9/2010,that RIM,Canada, would allow Indian Government access to its encrypted Messenger service,and it would be studied and India would come out with its reaction within 60 days,from the end of August.This was RIM Blackberry's response to the fears expressed by not only India but some West Asian nations,also,that terrorists could misuse the encryption facility for covert communications.
But,now, the Indian Government has found that it is unable to access the said messages from Blackberry.

BlackBerry and Terrorism

BlackBerry has  offered India several ways to allow authorities to monitor communications.It will be checked by the GOI within 60 days,as on 14/9/2010.Read here
India is afraid that the facilities in the contraption may be used by Terrorists.Similar fears have been expressed by some  West Asian Nations.
Blackberry may escape ban,by agreeing to provide "manual interception of its messenger services". Read here
    Canada's Trade Minister,Van Loan and commerce and industry minister Anand Sharma discussed the issue,and the former is confident that the problems will be sorted out,though there are differing opinions from the Indian and the Canadian sides,as to what is possible and what is not. The whole problem revolves around access to encrypted data,which may be exploited by terrorists,for covert communications,as some nations fear,in Blackberry. Read here 
The Canadian Co,RIM, has about one million of its 41 million BlackBerry customers in India, most of them are corporate users, making the country a key market.

Read more: HERE