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
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