LOCK-0

Modern, secure, and lightweight file encryption software written in Python.

LOCK-0 is a desktop application designed to securely encrypt and decrypt files using modern cryptographic standards. It combines a simple graphical interface with authenticated encryption to protect your data while remaining easy to use.

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Screenshots

Main Window	Encryption	Befor Decryption

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Features

• AES-256-GCM authenticated encryption
• PBKDF2-HMAC-SHA256 key derivation
• 600,000 PBKDF2 iterations
• Secure deletion of original files
• Automatic file integrity verification
• Folder-based encryption
• Modern CustomTkinter interface
• Cross-platform support
• Random salt and nonce generation
• SHA-256 integrity validation

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Security

LOCK-0 follows modern cryptographic best practices.

Component	Specification
Encryption Algorithm	AES-256-GCM
Key Derivation	PBKDF2-HMAC-SHA256
PBKDF2 Iterations	600,000
Key Size	256-bit
Salt	16 bytes
Nonce	12 bytes
Integrity	GCM Authentication Tag
Hash Function	SHA-256

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Encryption Workflow

Password
    │
    ▼
PBKDF2-HMAC-SHA256
(600,000 iterations)
    │
    ▼
256-bit Encryption Key
    │
    ▼
AES-256-GCM
    │
    ▼
Encrypted File

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Encrypted File Structure

┌────────────────────────────┐
│ Magic Header               │
├────────────────────────────┤
│ Version                    │
├────────────────────────────┤
│ Original File Size         │
├────────────────────────────┤
│ Random Salt (16 bytes)     │
├────────────────────────────┤
│ Random Nonce (12 bytes)    │
├────────────────────────────┤
│ Ciphertext                 │
├────────────────────────────┤
│ Authentication Tag         │
└────────────────────────────┘

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Requirements

• Python 3.8 or newer
• Windows, Linux or macOS

Required packages:

cryptography
customtkinter
Pillow

Install everything with:

pip install -r requirements.txt

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Installation

Clone the repository:

git clone https://github.com/BassemMohamed44/LOCK-0.git

cd LOCK-0

Install dependencies:

pip install -r requirements.txt

Run the application:

python LOCK-0.py

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Building an Executable

Using PyInstaller:

pip install pyinstaller

pyinstaller ^
    --onefile ^
    --windowed ^
    --icon=L0.ico ^
    LOCK-0.py

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Usage

Encrypt Files

1. Launch LOCK-0.
2. Select the folder to encrypt.
3. Enter a strong password.
4. Choose Encrypt.
5. Click Start.

The original files will be securely deleted after successful encryption.

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Decrypt Files

1. Launch LOCK-0.
2. Select the folder containing encrypted files.
3. Enter the correct password.
4. Choose Decrypt.
5. Click Start.

The original files will be restored.

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Project Structure

LOCK-0/
│
├── LOCK-0.py
├── requirements.txt
├── LICENSE
├── README.md
├── SECURITY.md
└── assets/

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Supported Platforms

Platform	Status
Windows	Supported
Linux	Supported - It requires very minor adjustments.
macOS	Supported - It requires very minor adjustments.

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Roadmap

• Command Line Interface
• Drag & Drop support
• Multi-threaded encryption
• Single file encryption mode
• Automatic update checker
• Dark / Light theme
• Localization
• Encryption history
• Secure password generator

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Contributing

Contributions are welcome.

1. Fork the repository.
2. Create a feature branch.

git checkout -b feature/my-feature

3. Commit your changes.

git commit -m "Add new feature"

4. Push the branch.

git push origin feature/my-feature

5. Open a Pull Request.

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Security Notice

LOCK-0 is designed to provide strong encryption, but security also depends on the user.

Please remember:

• Use a strong and unique password.
• Keep backups of important files.
• Never encrypt operating system files.
• There is no password recovery mechanism.
• Lost passwords cannot be recovered.

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License

This project is licensed under the MIT License.

See the LICENSE file for more information.

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Acknowledgments

This project relies on several excellent open-source libraries.

• cryptography
• CustomTkinter
• Pillow

Thanks to the maintainers and contributors of these projects.

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Built with Python.

If you find this project useful, consider giving it a ⭐ on GitHub.