Secured way of transactions for the Government services is the major issue of concern. System security is the process of protecting data from unauthorized access, use, disclosure, destruction, modification, or disruption. Basic principles of Information Security are confidentiality, integrity, and availability.

The traditional approach to this challenge is to create computing platforms, languages, and applications that enforce restrictions such that agents (such as users or programs) can only perform actions that have been allowed according to some specified security policy.

It is important to distinguish the techniques used to increase a system's security from the issue of that system's security status. In particular, systems, which contain fundamental flaws in their security designs, cannot be made secure without compromising their usability. Consequently, most computer systems cannot be made secure even after the application of extensive "computer security" measures. Furthermore, if they are made secure, often it is to the detriment of usability. The following techniques can be used in engineering secure systems.