CryptXT

Advanced File and Message Encryption Tool

Military-grade encryption with AES-256-GCM, Argon2id key derivation, and HMAC integrity verification. A modern, secure, and user-friendly terminal application for protecting your sensitive data.

Features

Advanced Security

• AES-256-GCM: Authenticated encryption with built-in integrity verification
• Argon2id: Memory-hard key derivation (winner of Password Hashing Competition)
• HMAC-SHA256: Additional integrity verification layer
• Secure Random: Cryptographically secure salt and nonce generation
• Anti-Tampering: Authentication tags prevent data modification

Modern Interface

• Beautiful terminal UI with Rich library
• Real-time progress indicators
• Color-coded feedback (green for success, red for errors)
• Clean and intuitive menu system
• Spinner animations for visual feedback

Cross-Platform

• Linux
• macOS
• Windows

Functionality

• Message Encryption: Encrypt text messages to Base64 format
• Message Decryption: Decrypt Base64 encrypted messages
• File Encryption: Encrypt any file type with .cryptxt extension
• File Decryption: Restore encrypted files to original format
• Security Info: View detailed security specifications

Installation

Quick Install Methods

Method 1: pip (Recommended for Python users)

pip install cryptxt
cryptxt

Method 2: npx (No installation needed)

npx cryptxt

Method 3: npm (Global install)

npm install -g cryptxt
cryptxt

Method 4: pipx (Isolated environment)

pipx install cryptxt
cryptxt

Detailed Installation

Linux / macOS

# Clone the repository
git clone https://github.com/vyofgod/CryptXT.git
cd CryptXT

# Run installation script
chmod +x install.sh
./install.sh

# Start the application
python3 cryptxt.py

Windows (Command Prompt)

REM Clone the repository
git clone https://github.com/vyofgod/CryptXT.git
cd CryptXT

REM Run installation script
install.bat

REM Start the application
python cryptxt.py

Windows (PowerShell)

# Clone the repository
git clone https://github.com/vyofgod/CryptXT.git
cd CryptXT

# Run installation script
.\install.bat

# Start the application
python cryptxt.py

Manual Installation

Prerequisites

• Python 3.7 or higher
• pip (Python package manager)
• git

Step 1: Clone Repository

git clone https://github.com/vyofgod/CryptXT.git
cd CryptXT

Step 2: Install Dependencies

pip install -r requirements.txt

Or install packages individually:

pip install cryptography argon2-cffi rich

Step 3: Run Application

Linux/macOS:

python3 cryptxt.py

Windows:

python cryptxt.py

Alternative: Direct Download

If you don't have git installed:

1. Download ZIP: https://github.com/vyofgod/CryptXT/archive/refs/heads/main.zip
2. Extract the archive
3. Open terminal/command prompt in the extracted folder
4. Run installation script or install dependencies manually

Security Specifications

Encryption Algorithm

• Algorithm: AES-256-GCM (Advanced Encryption Standard)
• Key Size: 256 bits
• Mode: Galois/Counter Mode with authentication
• Nonce: 12 bytes (96 bits) - unique per encryption
• Tag: 16 bytes (128 bits) - authentication tag

Key Derivation Function

Primary (Recommended): Argon2id

• Time cost: 3 iterations
• Memory cost: 64 MB
• Parallelism: 4 threads
• Type: Hybrid (Argon2id)
• Resistant to: GPU attacks, side-channel attacks, time-memory trade-offs

Fallback: PBKDF2-HMAC-SHA256

• Iterations: 600,000 (OWASP 2024 recommendation)
• Used when Argon2 is not available

Additional Security Layers

• HMAC-SHA256: 32-byte integrity verification
• Salt: 32 bytes of cryptographically secure random data
• Secure Random: Uses secrets module for all random generation

Data Format

Encrypted Data Structure:

[SALT: 32 bytes] + [NONCE: 12 bytes] + [HMAC: 32 bytes] + [CIPHERTEXT + AUTH_TAG]

Usage

Encrypt a Message

1. Run the application: python3 cryptxt.py
2. Select option 1 (Encrypt Message)
3. Enter your message
4. Enter a strong password
5. Copy the encrypted Base64 output

Example:

Message: "Hello, World!"
Password: MySecurePass123!
Output: gAAAAABm... (Base64 encrypted string)

Decrypt a Message

1. Select option 2 (Decrypt Message)
2. Paste the encrypted Base64 string
3. Enter the same password used for encryption
4. View the original message

Encrypt a File

1. Select option 3 (Encrypt File)
2. Enter the file path (e.g., document.pdf)
3. Enter a strong password
4. File is saved with .cryptxt extension (e.g., document.pdf.cryptxt)

Supported File Types:

• Documents: .pdf, .docx, .txt, .md
• Images: .jpg, .png, .gif, .bmp
• Videos: .mp4, .avi, .mkv
• Archives: .zip, .rar, .7z
• Any other file type

Decrypt a File

1. Select option 4 (Decrypt File)
2. Enter the encrypted file path (e.g., document.pdf.cryptxt)
3. Enter the password used for encryption
4. Original file is restored (e.g., document.pdf)

View Security Information

Select option 5 to view detailed security specifications including:

• Encryption algorithm details
• Key derivation parameters
• Security level assessment

Password Best Practices

Strong Password Examples

• MyS3cur3P@ssw0rd!2024
• Tr0pic@l_Sunset#99
• C0ffee&Code!Secure

Weak Password Examples

• 123456
• password
• qwerty

Password Guidelines

• Minimum 12 characters
• Mix of uppercase and lowercase letters
• Include numbers
• Include special characters (@, #, !, $, etc.)
• Avoid personal information
• Use a password manager

Security Comparison

Feature	CryptXT	Standard Tools
Encryption	AES-256-GCM	AES-256-CBC
Authentication	Built-in + HMAC	Manual
Key Derivation	Argon2id	PBKDF2
GPU Resistance	High	Low
Memory-Hard	Yes	No
Tampering Detection	Automatic	Manual

Important Notes

Password Recovery

• Passwords cannot be recovered - encryption is irreversible without the correct password
• Store passwords securely (use a password manager)
• Test decryption before deleting original files

Backup Recommendations

• Always backup important files before encryption
• Test the decryption process with a copy first
• Store encrypted files and passwords separately

Security Considerations

• This tool provides military-grade encryption
• Suitable for highly sensitive data
• No backdoors or password recovery mechanisms
• Open source - code can be audited

Performance

Operation	Small (<1MB)	Medium (1-10MB)	Large (>10MB)
Message Encryption	~0.5s	N/A	N/A
File Encryption	~1s	~2-5s	~5-15s
File Decryption	~1s	~2-5s	~5-15s

Performance varies based on hardware and Argon2 memory cost

Testing

Linux / macOS

Create a test file:

echo "This is a test file for CryptXT encryption." > test.txt

Encrypt it:

python3 cryptxt.py
# Select option 3
# File: test.txt
# Password: TestPass123!

Verify encryption:

cat test.txt.cryptxt  # Should show encrypted binary data

Decrypt it:

python3 cryptxt.py
# Select option 4
# File: test.txt.cryptxt
# Password: TestPass123!

Verify decryption:

cat test.txt  # Should show original content

Windows (Command Prompt)

Create a test file:

echo This is a test file for CryptXT encryption. > test.txt

Encrypt it:

python cryptxt.py
REM Select option 3
REM File: test.txt
REM Password: TestPass123!

Verify encryption:

type test.txt.cryptxt

Decrypt it:

python cryptxt.py
REM Select option 4
REM File: test.txt.cryptxt
REM Password: TestPass123!

Verify decryption:

type test.txt

Using Example File

The repository includes an example.txt file for testing:

# Linux/macOS
python3 cryptxt.py

# Windows
python cryptxt.py

# Then select option 3 and use: example.txt

System Requirements

Minimum Requirements

• OS: Linux, macOS, Windows 10/11
• Python: 3.7 or higher
• RAM: 128 MB (256 MB recommended for Argon2)
• Disk: 50 MB free space

Tested On

• Ubuntu 20.04+, Fedora 35+, Debian 11+
• macOS 10.14+
• Windows 10, Windows 11

Troubleshooting

Common Issues

Issue: "Python not found"

# Linux (Debian/Ubuntu)
sudo apt install python3 python3-pip

# Linux (Fedora)
sudo dnf install python3 python3-pip

# macOS
brew install python3

# Windows: Download from https://www.python.org/downloads/

Issue: "pip not found"

# Linux
sudo apt install python3-pip  # Debian/Ubuntu
sudo dnf install python3-pip  # Fedora

# macOS
python3 -m ensurepip --upgrade

# Windows
python -m ensurepip --upgrade

Issue: "Permission denied" (Linux/macOS)

chmod +x cryptxt.py install.sh

Issue: "Module not found"

pip install --upgrade -r requirements.txt

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Development Setup

Linux/macOS:

# Fork and clone
git clone https://github.com/YOUR_USERNAME/CryptXT.git
cd CryptXT

# Create virtual environment
python3 -m venv venv
source venv/bin/activate

# Install dependencies
pip install -r requirements.txt

# Make changes and test
python3 cryptxt.py

Windows:

REM Fork and clone
git clone https://github.com/YOUR_USERNAME/CryptXT.git
cd CryptXT

REM Create virtual environment
python -m venv venv
venv\Scripts\activate

REM Install dependencies
pip install -r requirements.txt

REM Make changes and test
python cryptxt.py

Contribution Guidelines

1. Fork the repository
2. Create a feature branch: git checkout -b feature-name
3. Make your changes
4. Test thoroughly on your platform
5. Commit: git commit -m "Add feature"
6. Push: git push origin feature-name
7. Submit a pull request

License

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

Disclaimer

This software is provided "as is" without warranty of any kind. While it uses military-grade encryption, the developers are not responsible for any data loss. Always maintain backups of important files.

Resources

• AES-GCM Specification
• Argon2 Documentation
• OWASP Password Storage
• Cryptography Library

Support

For issues, questions, or suggestions:

• Issues: GitHub Issues
• Discussions: GitHub Discussions
• Documentation: Check this README and code comments
• Security: Review security specifications above

Quick Command Reference

Installation Commands

System	Command
Linux/macOS	git clone https://github.com/vyofgod/CryptXT.git && cd CryptXT && ./install.sh
Windows	git clone https://github.com/vyofgod/CryptXT.git && cd CryptXT && install.bat

Running Commands

System	Command
Linux/macOS	python3 cryptxt.py
Windows	python cryptxt.py

Update Commands

# Linux/macOS
cd CryptXT
git pull origin main
pip install --upgrade -r requirements.txt

# Windows
cd CryptXT
git pull origin main
pip install --upgrade -r requirements.txt

Links

• Repository: https://github.com/vyofgod/CryptXT
• Issues: https://github.com/vyofgod/CryptXT/issues
• Releases: https://github.com/vyofgod/CryptXT/releases

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Stay secure! Protect your data with CryptXT.

Version 1.0.0 | GitHub