LOCK-0 v1.0.0 - Encryption Suite

Advanced File Encryption Tool

---

Table of Contents

• Program Introduction
• Security features
• Requirements
• Installation
• How to use
• Technical specifications
• Practical examples
• Frequently Asked Questions
• Contribution
• Licensing

---

Program Introduction

LOCK-0 It is an advanced and secure encryption tool developed using the latest global encryption standards.

What makes a LOCK-0 special?

Very strong encryption - AES-256-GCM Full protection - Automatically encrypt/decrypt multiple files Secure Delete - Permanent deletion of original files with no possibility of recovery Easy interface - Beautiful and easy-to-use graphical interface Comprehensive support - Supports all file and folder types

---

Security features

Encryption Algorithm

- AES-256-GCM (Advanced Encryption Standard)
- 256-bit key length
- Galois/Counter Mode (GCM) for authentication

Key Derivation

PBKDF2-HMAC-SHA256
- 600,000 iterations
- 16-byte random salt
- Resistant to Brute Force attacks

Additional Security

✓ Cryptographic Hash Verification (SHA-256)
✓ Secure File Deletion (3-pass overwrite)
✓ Magic Header Validation
✓ File Size Integrity Check
✓ Nonce Randomization (12-byte random per file)

The encrypted file contains:

[Magic Header 10 bytes] + [Version 4 bytes] + [File Size 8 bytes] 
+ [Salt 16 bytes] + [Nonce 12 bytes] + [Encrypted Data]

---

Requirements

Required system:

• Python: 3.8 or later
• OS: Windows, macOS, Linux
• Memory: 512 MB minimum
• Storage: Depending on the size of the files to be encrypted

Required libraries:

- cryptography >= 41.0.0
- customtkinter >= 5.0.0
- Pillow >= 10.0.0

---

Installation

Step 1: Clone the repository

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

Step 2: Install the libraries

pip install -r requirements.txt

Or manually:

pip install cryptography customtkinter pillow

Step 3: Run the program

python LOCK-0.py

(Optional) Create an executable .exe file

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

---

How to use

GUI:

To encrypt files:

1. Select the folder - Click on "Browse" and select the folder you want to encrypt.
2. Enter the password - Enter a strong password (8+ characters)
   • Make sure you remember your password! Without it, you won't be able to decrypt the encryption.
3. Select "File Encryption"
4. Click "Start Process"
5. The original files will be securely deleted after successful encryption.

To decrypt files:

1. Select the folder - Select the folder containing the .enc files.
2. Enter the password - Enter the same password used for encryption.
3. Select "Decrypt"
4. Click "Start Process"
5. The original files will be visible once the .enc files are removed.

---

Technical specifications

Release Information:

Feature	Description
Version	1.0.0 (Stable)
Release date	2026
Programming language	Python 3.8+
Program size	~50 MB (With libraries)

security algorithms:

┌─────────────────────────────────────┐
│   LOCK-0 Security Architecture      │
├─────────────────────────────────────┤
│                                     │
│  User Password                      │
│       ↓                             │
│  PBKDF2 (SHA-256, 600K iterations)  │
│       ↓                             │
│  256-bit Key                        │
│       ↓                             │
│  AES-256-GCM                        │
│       ↓                             │
│  Encrypted File + Metadata          │
│                                     │
└─────────────────────────────────────┘

Performance:

• Encryption speed: ~50-100 MB/s (According to the processor)
• Memory consumption: Variable depending on file size
• Compression: No compression (maintains original size)

---

Practical examples

Example 1: Encrypting an entire folder

# Folder: E:/my_documents/
# Password: MySecurePassword123
# Result: All files become *.enc

Example 2: Decrypting files

# Folder: E:/my_documents/
# Password: MySecurePassword123
# Result: The original files reappear

Example 3: The encrypted file

Before encryption:
  document.pdf          (2.5 MB)
  photo.jpg             (5.2 MB)
  video.mp4             (250 MB)

After encryption:
  document.pdf.enc      (2.5 MB)
  photo.jpg.enc         (5.2 MB)
  video.mp4.enc         (250 MB)
  
Original files: Safely deleted

---

Frequently Asked Questions

Q: Is the program really safe?

A: Yes! LOCK-0 uses encryption standards:

• AES-256 (the same one used by the US government)
• PBKDF2 with 600,000 replicates (safe against Brute Force attacks)
• GCM Authentication (Data Integrity Verification)

Q: What if I forget my password?

A: There is no way to decrypt the data without the correct password. This is intentional for security reasons!

• Make sure to save your password in a safe place

Q: Can files be decrypted from another server?

A: Yes! As long as you have:

1. Encrypted files (.enc)
2. Correct password
3. LOCK-0 installed on the device

Q: Does the program compress files?

A: No. The program retains the original file size (it may increase slightly due to metadata security).

Q: Can operating system files be encrypted?

A: We do not recommend encrypting critical operating system files! Use it for personal files only.

Q: How long does the encryption process take?

A: It depends on:

• File size (larger = slower)
• Processor speed
• Hard drive speed
• Average time: 50-100 MB/s

Q: Does the program work without internet?

A: Yes, absolutely! The program works completely independently without the internet.

Q: Can the same password be used for multiple files?

A: Yes, but it is preferable to use different strong passwords for very sensitive files.

---

Contribution

We welcome your contributions! If you want to improve LOCK-0:

steps Contribution:

1. Fork repo
2. A branch was established new:

   git checkout -b feature/your-feature-name

3. Make changes and add improvements
4. Test the changes thoroughly
5. Submit Pull Request

Areas of welcome development:

• Improved graphical interface
• Additional security features
• Improved performance
• Improved documentation
• Bug fixes
• Support for new languages

---

Licensing

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

In short:

You can use the program freely. You can modify it. You can distribute it. No warranty or liability from the developers.

Important security warnings

Before using LOCK-0:

1. Keep your password in a very secure place.

• Without it, you won't be able to decrypt the data!
• There is no "forgot password" option.

2. Make a Backup Before Encrypting

• Make sure you have a backup of your important files
• In case something goes wrong

3. Use strong passwords

• Don't use easy passwords (e.g., 123456)
• Use a combination of: uppercase letters + lowercase letters + numbers + symbols

4. Do not encrypt system files

• Avoid encrypting critical operating system files
• This may cause the system to fail to boot

5. Test First

• Test on unimportant files first.
• Make sure you understand the tool before using it on sensitive files.

---

Support and assistance

Found a bug?

• Open Issue New
• Explain the problem in detail.
• Add screenshots if possible.

Questions?

• Use the Discussions forum
• Or send an email

---

Roadmap

Planned features:

• Night and light mode support
• Individual file encryption support
• Advanced settings options
• Command-line interface (CLI) version
• Mobile app
• Additional language support
• Encryption statistics display
• Advanced progress notifications

---

Educational resources

About encryption:

• AES Encryption Explained
• PBKDF2 Key Derivation
• GCM Authentication Mode

About safety:

• OWASP Cryptographic Failures
• Password Security Best Practices

---

Thanks and appreciation

Thank you for using LOCK-0! If you liked the project:

• Add a star to the repository
• Share the project with others
• Share your feedback and suggestions

---

legal texts

Disclaimer:

LOCK-0 is provided "as is" without any warranty of any kind.
Use of this software is at your own risk.
The developers accept no responsibility for data loss or other damages.

---

** LOCK-0 - Keep Your Files Safe **

Back to Top