Security of the information in defence department of any country is of utmost importance. And today in this nuclear world, security and privacy of the various defence plans and other valuable strategies of a country''s defence force is on focus. This security is of prime importance during war period. The defence strategies are normally discussed in the meetings held at the various headquarters of the defence department. In today''s computing world these meetings are conducted with the various concerned persons connected via a secured network in a room. If a person is unable to attend a meeting due to some important work then he takes part in the discussion through his Laptop. Such type of advanced meetings has also become a part of research centres where innovation of new technologies is carried out. Although such advanced meetings are efficient when they have to be conducted in an emergency, the question about the secured flow of data still remains a big question. The main aim of this book is to strive for effective security solutions in such areas where the privacy of each and every piece of information is essential for the betterment of a country''s national pride.