KebiShifrator

A professional desktop application for secure file encryption and decryption using hybrid cryptography (RSA + AES). Built with Python and PyQt6.

Features

Security Features

• Hybrid Encryption: RSA-4096 + AES-256-GCM
• Secure Key Management: Password-protected private keys
• Authenticated Encryption: GCM mode for data integrity
• Key Derivation: PBKDF2 with 480,000 iterations

User Interface

• Modern Themes: Professional appearance. Light and Dark theme support
• Multi-language: English and Russian interface
• Tab-based Layout: Intuitive organization
• Progress Tracking: Real-time progress bars
• Operation History: Complete activity log

Quick Start

Installation

# Install dependencies
pip install PyQt6 cryptography qdarkstyle

Usage

# Run the application
python kebishifrator.py

How to Use

1. Key Generation

• Navigate to "Key Management" tab
• Enter key pair name
• Set a strong password
• Select key directory
• Click "Generate Key Pair"

2. File Encryption

• Go to "Encryption" tab
• Select file to encrypt
• Choose public key from dropdown
• Set output file path
• Click "Encrypt"

3. File Decryption

• Go to "Decryption" tab
• Select encrypted file
• Choose private key from dropdown
• Enter password
• Set output file path
• Click "Decrypt"

Technical Details

Cryptography

• Asymmetric Encryption: RSA-4096 with OAEP padding
• Symmetric Encryption: AES-256-GCM
• Key Derivation: PBKDF2-HMAC-SHA256
• Random Generation: Secure random bytes

File Format

[16 bytes - IV]
[16 bytes - GCM tag]
[4 bytes - encrypted key length]
[N bytes - encrypted session key]
[remaining - encrypted data]

Key Storage

• Public Keys: Standard PEM format
• Private Keys: Encrypted with AES-GCM

Project Structure

kebishifrator/
├── kebishifrator.py          # Main application
├── requirements.txt          # Dependencies
├── README.md                 # Documentation
├── icon.ico                  # Application icon
├── KebiShifrator.exe         # Application .exe file
├── license.txt               # License file
└── .gitignore                # Git ignore rules

Security Notice

This software is developed for educational and personal use. While it implements industry-standard cryptographic algorithms, it has not undergone professional security audit. For mission-critical data protection, always use professionally audited and supported encryption solutions.

Development

Requirements

• Python 3.8 or higher
• PyQt6 6.6.0
• cryptography 41.0.0
• qdarkstyle 3.1.0

Building from Source

git clone https://github.com/yourusername/kebishifrator.git
cd kebishifrator
pip install -r requirements.txt
python kebishifrator.py

Troubleshooting

Common Issues

Empty dropdown lists

• Ensure key directory is selected
• Generate keys first
• Use "Browse" to reselect key directory

Encryption/Decryption errors

• Verify file permissions
• Check if keys are valid
• Ensure correct password for private key

Application not starting

• Verify Python version (3.8+ required)
• Check all dependencies are installed
• Run from terminal to see error messages

License

This project is licensed under the MIT License - see the LICENSE file for details.

Support

For issues and questions:

1. Check the troubleshooting section
2. Review the code comments
3. Ensure all dependencies are properly installed