COMPUTER SECURITY SYSTEM USING DATA ENCRYPTION AND DECRYPTION

TOPIC: DESIGN OF COMPUTER SECURITY SYSTEM USING DATA ENCRYPTION AND DECRYPTION
ABSTRACT
Computer security is a process of protecting computer system and information from harm and unauthorized user. The most important computer security tool beyond human integrity used is cryptography. Cryptography is used to hide data from public view and to ensure that the integrity and privacy of any data sent across a network has not been compromised. Security in communication and network system have come a long way to ensure that information transmitted between two or more parities involved in a conversation enjoys the benefits of privacy and as well as to ensure the privacy of data saved in a computer system. This project work is aimed at design and implementation of computer security: data encryption and decryption system. This project work will be done using Visual Basic programming language and Microsoft Access.

TABLE OF CONTENT

Acknowledgement ………………….…………………………………………………i

Abstract              …………………….…………………………………………………ii

Table of content……………………….……………………………………………….iii

Chapter one: Introduction

1.0.0       Background of study ………………………….………………………………1

1.1.0       Statement of the problem ………..…………….………………………………2

1.2.0       Aim and Objectives..……………….………………………………………….2

1.3.0       Scope of study ………………………….………….………………………….3

1.4.0       Significance …………………………….………….………………………….3

1.5.0       Definition of term…………………………..………………………………….4

Chapter Two:Literature review

2.0.0       Concept of Crypto security …………………………………………….....…...5

2.1.0       Cryptography …………………………………………………………………5

Chapter Three:Research Methodology / System Analysis

3.0.0       Requirement Analysis ……….………………………………………………16

3.1.0       Fact finding method used…………………………………….……………….17

3.1.1       Observation method ……………………………………………………….…17

3.1.2       Face to face interview ……………………………………………………..…17

3.1.3       Internet……………………………………………………………………….17

3.2.0       System Analysis ………………………………………………………….….17

3.2.1       The element of encryption …………………………………………………...19

3.2.2       what you can do with encryption……………………………………………..20

3.3.0       Input analysis ………………………………………………………………...20

3.4.0       Output analysis ………………………………………………………………20

3.5.0       System specification …………………………………………………………21

3.5.1       Main menu specification ……………………………………………………..21

3.5.2       Input specification………………………………………………………..…..21

3.5.3       Output specification …………………………………………………...……..25

3.6.0       Structured data flow diagram of the system………………………………….25

 

Chapter Four: system design and implementation

4.0.0       System Design ……………………………………………………………….27

4.0.1       User interface design ………………………………………………………...27

4.0.2       main menu design…………………………………………………………....27

4.1.0       input form design………………………………………………………….…28

4.2.0       Database design ……………………………………………………………...29

4.3.0       program module design…………………………………………………..….30

DEPERTMENT OF COMPUTER SCIENCE

TOPIC: DESIGN OF COMPUTER SECURITY SYSTEM USING DATA ENCRYPTION AND DECRYPTION

DEPARTMENT: INDUSTRIAL MATHEMATICS

COURSE TITLE: SYSTEM ANALYSIS AND DESIGN

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