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Design and Implementation of File Encryption and Hash System
S

Software Implementation of File Encryption and Hash System

C.S. Project Software
Reference ID: PS-5048-TM

Software Implementation under Computer Science (CS)

Software Implementation of File Encryption and Hash System can be acquired by Contacting or Whatsapping Sparklyn Services Software Programmer with the number displayed below 👇

DEDICATION

This research work titled "Design and Implementation of File Encryption and Hash System" is dedicated to God for his enabling grace and to all computer enthusiasts who help to make life a pleasant experience.



i

ACKNOWLEDGEMENT

I owe my indebtedness to my Supervisor (Name of your Supervisor), the Head of Department (Name of your HOD), the Lecturers in the department of Computer Science (CS), Book Authors and Profound Scholars of existing/related research work for your moral support that facilitated the successful completion of my (Tertiary Institution level). I am grateful to God Almighty and my parent for their financial support in my career. I really appreciate you all for everything, Thank you very much.



ii


Design and Implementation of File Encryption and Hash System

TABLE OF CONTENTS

Preliminary Pages

Chapter One

Introduction

  • 1.1 Background …

Chapter Two

Literature Review

  • 2.1 Introduction

Chapter Three

System Analysis and Design

  • 3.1 Methodology Adopted
  • 3.1.1 Problem Identification Using SSADM
  • 3.2 Analysis of the Existing System
  • 3.2.1 Dataflow of the Existing System
  • 3.2.2 Disadvantages Of The Existing System
  • 3.2.3 Weakness of the existing System
  • 3.3 Feasibility Study
  • 3.3.1 Economic Feasibility
  • 3.3.2 Technical Feasibility
  • 3.3.3 Operational Feasibility
  • 3.4 Analysis of the Proposed System
  • 3.4.1 Data Flow Diagram of the Proposed System
  • 3.4.2 Advantages of the Proposed System
  • 3.4.3 Justification of the Proposed System
  • 3.5 Functional Requirements
  • 3.5.1 Use Case Diagram Of The Admin / User Privileges
  • 3.6 Data Requirements
  • 3.7 High Level Model of the Proposed System

Chapter Four

System Design and Implementation

  • 4.1 Objectives of the Design
  • 4.2 Cohesion and Decomposition High level Model
  • 4.3 Control Center / Overall Dataflow Diagram
  • 4.3.1 Proposed System Operation Flowchart
  • 4.4 System Specification and Design
  • 4.4.1 Input and Output Specification
  • 4.4.2 Database Specification and Design
  • 4.4.3 Data Dictionary
  • 4.5 Choice and Justification of Programming Language
  • 4.6 Program Documentation
  • 4.7 Implementation Techniques
  • 4.8 Programming Module Specification
  • 4.8.1 Installation
  • 4.9 Computer Hardware Minimum Requirement
  • 4.10 Software Requirement
  • 4.11 Personnel / User Training

Chapter Five

Summary, Conclusion, and Recommendation

  • 5.1 Introduction
  • 5.2 Summary
  • 5.3 Conclusion
  • 5.4 Recommendation

References

Appendix A - Source Code

Appendix B - Object Program




iii

ABSTRACT

File encryption attempts to ensure secrecy in communications, such as those of spies, military leaders, and diplomats, but it have also had religious applications. The aim of the study is to design and implement a File Encryption and Hash System. In achieving this aim, the following specific objectives of study were considered to design and develop an application software that will understand and improve the file data security through encryption of data, protect the pdf file (.pdf) from being viewed by third party using encryption and ensure the data confidentiality and integrity along with the safe transmission of file data over the web. The motivation that led to the implementation of the proposed system is that the password method used in almost all commercial operating systems is probably not very strong against a sophisticated or unsophisticated attacker. The choice of data encryption comes next in the minds of those that want reduction of unauthorized access on confidential files or data. The methodology adopted in this study is the structure system analysis and design methodology (SSADM) which is a technical approach for analyzing and designing an application or system by applying object oriented programming as well as visual modeling throughout the software development process. The programming language used is HTML, CSS, JAVASCRIPT, PHP, SQL and JQUERY. The reason why web programming languages was used is because, it is platform independent and it is a web based application. This study serves as a contribution towards improving information, data and information security on computerized information systems especially for organizations where data is transferred from one point to another. The expected result is a computerized File Encryption and Hash System that will encrypt files and also produce an accurate and corresponding file data after decryption.





iv


Design and Implementation of File Encryption and Hash System

CHAPTER ONE

1.1 Introduction

In the past, security was simply a matter of locking the door or storing files in a locked filing cabinet or safe. Today, paper is no longer the only medium of choice for housing information. Files are stored in computer databases as well as file cabinets. Hard drives and floppy disks hold many of our secret information. In the physical world, security is a fairly simple concept. If the locks on your house’s doors and windows are so strong that a thief cannot break in to steal your belongings, the house is secure. For further protection against intruders breaking through the locks, you might have security alarms. Similarly, if someone tries to fraudulently withdraw money from your bank account but the teller asks for identification and does not trust the thief’s story, your money is secure. When you sign a contract with another person, the signatures are the legal driving force that impels both parties to honor their word.

As the Internet becomes a more pervasive part of daily life, the need for e-security becomes even more critical. Any organization engaged in online activity must assess and manage the e-security risks associated with this activity. Effective use of cryptographic techniques is at the core of many of these risk-management strategies. The most important security tool is cryptography.

1.2 Background of the Study

The ongoing dilemma of digital age is balancing convenience against security. Security is a system safeguards for protecting information technology against disasters, system failure, and an unauthorized access that can result in damage, loss or exposure. There are several reports of spammers, crawlers and hackers who break into people’s privacy to gain illegal access to their data. This has posed greater challenges on people who use database, transact online, and internet users. Information is a valuable and costly asset that must be presented, controlled and planned just like other valuable assets within an organization. This work is designed to provide a security mechanism using a computerized data encryption system, readable data is altered into unreadable form to prevent unauthorized access. Encryption is able to use powerful mathematical concept to create coded message that is virtually impossible to break. It is easy to encrypt a message on a simple personal computer so that the biggest computer in the world could not decipher without spending for more time on the problem that exists in the life span of the entire universe.

There are two basic forms of encryption; private key encryption and public key encryption, the same secret key is used by the sender and receiver to encrypt and decrypt message. Public key encryption also known as asymmetric key encryption uses two different keys at once, a combination of a private key and public key, the private key is known only to your personal computer, while the public key is given by your computer to any computer that wants to communicate securely with it. To decode an encrypted message, a computer must use the public key, provided by the originating computer, and its own private key.

1.3 Statement of the Problem

The problem is security. The password method used in almost all commercial operating systems is probably not very strong against a sophisticated or unsophisticated attacker. The choice of data encryption comes next in the minds of those that want reduction of unauthorized access on confidential files or data. Security provided by the computer operating systems come with a preset super user account and password.

The super user may have a password to control network functionality, another to conduct or access nightly backups, create accounts, and so on. For a cracker, logging on to a system as the super user is possibly the best way to collect data or do damage. If the super user has not changed an operating system’s preprogrammed passwords, the network is vulnerable to attack.

Most crackers know these passwords, and their first attempt to break into a network is simply to try them. If an attacker cannot log on as the super user, the next best thing might be to figure out the user name and password of a regular user.

1.4 Aim and objective of the Study

The aim of the study is to design and implement an File Encryption and Hash System. In achieving this aim, the following specific objectives of study were considered to design and develop an application software that will;

  1. Understand and improve the file data security through encryption of data.
  2. Protect the pdf file (.pdf) from being viewed by third party using encryption.
  3. Ensure the data confidentiality and integrity along with the safe transmission of file data over the web.
  4. Create a network for each computer to easily upload and download encrypted files over the peer to peer network, and this can be done without having access to the internet.

1.5 Scope of the Study

The scope of study focuses on Design and Implementation of a File Encryption and Hash System.

1.6 Significant of the Study

This study serves as a contribution towards improving information, data and information security on computerized information systems especially for organizations where data is transferred from one point to another. It will contribute in solving the problems of insecurity on both networks for individual computers on a network. It also enhances the ability to support customers by providing secured and accurate access to all information. In the same manner, it will benefit those who transact online.

One of the most important tools for protecting your file from an authorized access is Data Encryption, any of various methods that are used to turn readable files into gibberish. Even if an attacker obtains the contents of the file, it is gibberish. It does not matter whether or not the operating system protections worked.

This study will also be of immense benefit to other researchers who intend to know more on this study and can also be used by non-researchers to build more on their research work. This study contributes to knowledge and could serve as a guide for other study.

1.7 Limitations of the Study

During the course of this study, many things militated against its completion, some of which are:

  1. Time Constraint: The time frame given to accomplish this project was very short due to school academic calendar and it was carried out under pressure which made the researcher not to implement some necessary features.
  2. Research material: availability of research material is a major setback to the scope of the study.
  3. Frequent power failure: This made the researcher append more money on fuel to ensure sustainable power.
  4. Financial Constraint: Insufficient fund tends to impede the efficiency of the researcher in sourcing for the relevant materials, literature or information and in the process of data collection (internet).

1.8 Definition of Terms

Based on this research work, the following terms are used, and briefly defined bellow;

Cryptography: This is the science of scrambling data.

Encryption: Encryption is the conversion of data into a form that cannot be easily understood by an unauthorized people.

Decryption: Decryption is the process of converting encrypted data back into its original form, so it can be understood.

CHAPTER TWO

2.0 Literature Review

2.1 Introduction

This chapter focuses on the review of related literature. A literature review includes the current knowledge as well as theoretical and methodological contributions to a particular topic. It documents the state of the art with respect to the topic you are writing. It surveys the literature in the topic selected. In this research work the literature review includes the …

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Proposal Writing Format for Computer Science (CS) Research Work

Final year research work is all about finding real life problem and proffering solution that will partially or totally eliminate the existing system bottlenecks. The following are the major and elective project proposal writing sections for "Design and implementation of file encryption and hash system" research work;

Major Sections
  • Motivation for Embarking on the Project

  • Brief Background of Study

  • Statement of Problems

  • Aim of the Study

  • Specific Objectives of the Study

  • Significance of the Study (Who benefits from the project and how?)

Elective Sections
  • Methodology and Reason for Using It (such as; models, SSADM, or OOADM)

  • Tools (programming languages and software used)



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Proposal Writing Format for Computer Science Research Work


Design and Implementation of File Encryption and Hash System is a proposal topic for final year research work, which comprises the major and elective project proposal writing sections for Design and Implementation of File Encryption and Hash System research work.

Major Sections
  • Motivation for Embarking on the Project

  • Brief Background of Study

  • Statement of Problems

  • Aim of the Study

  • Specific Objectives of the Study

  • Significance of the Study (Who benefits from the project and how?)

Elective Sections
  • Methodology and Reason for Using It (such as; models, SSADM, or OOADM)

  • Tools (programming languages and software used)


Defense Procedure for Computer Science Researchers


Know your Project / Seminar Work (Design and Implementation of File Encryption and Hash System): Here are the key point to study if your work is cumbersome or not.

  • Abstract

CHAPTER ONE

  • Motivation / Statement of Problems
  • Aims & Objective of Study
  • Scope of Study
  • Significance of Study

CHAPTER TWO

  • State two or more citation from your review of related literature.

CHAPTER THREE

  • Know the methodologies, tools and techniques used.

CHAPTER FOUR

  • Justification of your work and things to adhered to before using the system or research work.

CHAPTER FIVE

  • Conclusion and Recommendation

Dress Code: Your dress code should be cooperate wear for example; putting on suit and tie during project defense gives you an automatic mark without a word.

External Examiner / Supervisor Questioning & Student Answering: Questions will come from the research work, any difficult or unknown question, kindly say "Sorry Sir/Madam, the question is not within my scope of study".


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