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Secure File Sharing & Encrypted Storage System

📑 5 slides 👁 4 views 📅 2/23/2026

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Project Introduction

Developed a secure file sharing system with encrypted storage for enhanced data protection.

Project Introduction

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System Architecture

Three-tier architecture: presentation layer (HTML/CSS/JS), application layer (PHP), data layer (SQL).
Client-side encryption before upload and server-side decryption after download.
Database stores encrypted files with metadata like owner, access permissions.
Session management using PHP with secure cookie handling and timeout features.

System Architecture

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Security Features

End-to-end encryption using AES-256 with unique keys for each file transfer.
Secure password hashing with bcrypt algorithm for user authentication.
CSRF protection and input sanitization to prevent common web vulnerabilities.
Activity logging to track file access and system events for auditing.

Security Features

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Implementation Details

Responsive design using CSS Flexbox/Grid for compatibility across devices.
AJAX implementation for seamless file operations without page reloads.
MySQL database with optimized tables for quick file retrieval.
PHP scripts handle file processing, user authentication and access control.

Implementation Details

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Conclusion & Benefits

Provides secure alternative to conventional file sharing methods with encryption.
Lightweight solution using only basic web technologies without external dependencies.
Can be extended with features like two-factor authentication and file expiration.
Demonstrates practical application of security concepts in web development.

Conclusion & Benefits