The Source Code - Multilevel Security for Relational Databases - page 161

9
t he s ourCe C oDe
9.1 Introduction
This chapter will present the source code of the prototype that was
used throughout this topic. he tools that are used in the implementa-
tion of the prototype are described as follows:
• Microsoft SQL server 2008 R2. SQL server is a relational
database management system (RDBMS) from Microsoft
that is designed for the enterprise environment. SQL Server
runs on T-SQL (Transact-SQL), a set of programming
extensions from Sybase and Microsoft that add several
features to standard SQL, including transaction control,
exception and error handling, row processing, and declared
variables.
• Microsoft Visual Studio C#. Microsoft Visual Studio is an
integrated development environment (IDE) from Microsoft.
It is used to develop console and graphical user interface
applications. The C# language is a simple, modern, general-
purpose, object-oriented programming language.
This chapter will present the screen shots of the prototype and
the source code of the Microsoft SQL server 2008 R2 and the
Microsoft Visual Studio C# that were used in the implementation of
the prototype.
9.2 Screen Shots of the Prototype
The screen in Figure 9.1 is used for making the user log in to the
database by selecting the SQL server and entering his user name and
his password. At this screen the prototype will verify the credentials
of the user and will determine the user's security classification level
(Figure 9.2).
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