FILE TRANSFER SYSTEM USING ELLIPTIC CURVE CRYPTOGRAPHY

ABSTRACT

With the exponential growth of digital communication and cloud-based file sharing, ensuring the confidentiality, integrity, and authenticity of data has become a critical concern. This research presents the design and implementation of a secure file transfer system leveraging Elliptic Curve Cryptography (ECC) to provide robust data protection. ECC offers high-level security with relatively smaller key sizes, making it computationally efficient compared to traditional cryptographic methods. The system integrates ECC with complementary encryption techniques such as the Hill Cipher for text and Discrete Cosine Transform (DCT) for images to enhance security during file transmission. Developed using Python and the Django framework, with HTML, CSS, and JavaScript for the front end and MySQL for data storage, the system ensures encrypted file exchange, secure authentication, and user-friendly management of profiles and file operations. The study demonstrates that ECC-based encryption provides superior security while requiring less computational overhead, making it suitable for modern high-volume and resource-sensitive file transfer applications.

CHAPTER ONE

INTRODUCTION

1.1 Background to the Study

The rapid expansion of the Internet and digital technologies has revolutionized the way information is shared globally. Every day, vast quantities of sensitive data—including personal records, business documents, and multimedia content—are transmitted across networks, making data security a central concern for both individuals and organizations. Unauthorized access, interception, and tampering of digital files can result in significant financial losses, reputational damage, and privacy violations.

Cryptography, the science of encoding information, provides effective solutions for safeguarding digital data. Among various cryptographic techniques, Elliptic Curve Cryptography (ECC) has emerged as a preferred method due to its ability to provide strong security using smaller key sizes. ECC is based on the computational difficulty of the Elliptic Curve Discrete Logarithm Problem (ECDLP), which is exponentially harder to solve than equivalent key sizes in traditional schemes such as RSA. This makes ECC both secure and computationally efficient, particularly for resource-constrained environments and real-time applications.

Complementary encryption methods such as the Hill Cipher, a symmetric-key algorithm suitable for text encryption, and Discrete Cosine Transform (DCT), which transforms images into frequency-domain representations for secure transmission, are incorporated in this system. Together, these techniques provide a comprehensive framework for secure file transfer across modern networked environments.

1.2 Problem Statement

Despite advancements in digital communication, file transfer remains vulnerable to multiple security threats, including:

1. Data Interception: Files transmitted over insecure networks can be intercepted by malicious actors.

2. Unauthorized Access: Weak authentication mechanisms expose sensitive information to unauthorized users.

3. Integrity Breaches: Files can be altered or corrupted during transmission without detection.

4. Computational Overhead: Traditional public key encryption methods require large key sizes, increasing processing time and resource consumption.

There is a need for a lightweight, secure, and efficient file transfer system that minimizes computational demands while providing robust encryption and authentication.

1.3 Objectives of the Study

The general objective of this study is to develop a secure, ECC-based file transfer system to ensure confidential and efficient transmission of digital files. Specific objectives include:

1. Designing a user-friendly interface that allows secure registration, login, and profile management.

2. Implementing ECC for secure encryption and decryption of files during transfer.

3. Integrating Hill Cipher and DCT algorithms to provide additional security for text and image files.

4. Evaluating the system's performance in terms of security, computational efficiency, and usability.

1.4 System Architecture

The system comprises a single primary module for Users, who perform the following functions:

• Registration and Authentication: Users register with a unique username, email, and password, enabling secure login and profile management.

• File Encryption and Transfer: Users can send and receive encrypted files. ECC encrypts file contents, while the Hill Cipher is applied for text, and DCT is used for images.

• File Management: Users can view, download, and manage securely transmitted files.

Technologies Used:

• Frontend: HTML, CSS, JavaScript

• Backend: Python with Django framework

• Database: MySQL

Encryption Algorithms:

• Elliptic Curve Cryptography (ECC): Provides high-security encryption with smaller key sizes.

• Hill Cipher: Symmetric-key algorithm for text encryption.

• Discrete Cosine Transform (DCT): Converts image data to frequency domain for secure transmission.

1.5 Advantages of the System

1. High Security: ECC ensures strong encryption even with small key sizes, making it resistant to attacks.

2. Computational Efficiency: Requires less processing power compared to traditional public-key schemes.

3. User-Friendly: Simple registration, login, and file management interfaces.

4. Flexible Encryption: Supports both text and image files using complementary algorithms.

5. Data Integrity: Ensures that files are not altered or tampered with during transfer.

6. Scalability: Suitable for high-volume file transfer applications across networks.

SOFTWARE SYSTEM AVAILABLE. Language: Python  Total Cost: US $150  CONTACT: +2347063990319.