🔐 xsukax AES-256 File Encryptor/Decryptor

A military-grade, browser-based file encryption tool that provides unbreakable AES-256-GCM encryption with complete privacy. All operations happen directly in your browser – your files and passwords never leave your device.

🛡️ Why xsukax AES-256 File Encryptor/Decryptor?

Absolute Privacy

✅ 100% Client-Side Processing – No server uploads, ever
✅ Zero-Knowledge Architecture – Your data never touches our servers
✅ No Registration Required – Complete anonymity
✅ No Tracking or Analytics – What you encrypt stays your business
✅ No File Size Limits – Encrypt files of any size locally
✅ Offline Capable – Works without internet connection

Unbreakable Security

🔒 AES-256-GCM Encryption – The gold standard used by governments and military
🔑 PBKDF2 Key Derivation – 200,000 iterations for maximum password security
🎲 Cryptographically Secure Random – Unique salt and IV for every encryption
🔐 Web Crypto API – Native browser cryptography for maximum performance
🛡️ Authenticated Encryption – GCM mode ensures data integrity and authenticity

✨ Features

Core Functionality

📁 Universal File Support – Encrypt ANY file type (documents, images, videos, archives)
⚡ Lightning Fast – Hardware-accelerated encryption via Web Crypto API
🎨 Modern Luxurious UI – Dark theme with elegant animations
📊 Real-time Progress Bar – Visual feedback with percentage display
💾 Automatic Downloads – Encrypted files download instantly
🔄 Seamless Decryption – One-click decryption with password

Technical Excellence

No Dependencies – Pure vanilla JavaScript, no external libraries
Cross-Platform – Works on any modern browser (Chrome, Firefox, Safari, Edge)
Mobile Responsive – Perfect experience on phones and tablets
Lightweight – Single HTML file under 15KB
Open Source – Fully auditable code for transparency

🚀 Getting Started

Option 1: Direct Usage

Download the xsukax-AES-256-File-Encryptor-Decryptor.html file
Open it in any modern web browser
Start encrypting – no installation needed!

Option 2: Host It Yourself

# Clone the repository
git clone https://github.com/xsukax/xsukax-AES-256-File-Encryptor-Decryptor-Frontend.git

# Navigate to directory
cd xsukax-AES-256-File-Encryptor-Decryptor-Frontend

# Open in browser
open xsukax-AES-256-File-Encryptor-Decryptor.html
# or serve it locally
python -m http.server 8000

Option 3: GitHub Pages

Host it free on GitHub Pages for easy access from anywhere!

📖 How to Use

Select File – Click “Choose file” and select any file
Enter Password – Create a strong password (remember it!)
Click Encrypt – File processes locally with progress indicator
Save .enc File – Encrypted file downloads automatically

Decrypting Files

Select .enc File – Choose your encrypted file
Enter Password – Use the same password from encryption
Click Decrypt – Original file restored perfectly
Save Original – Decrypted file downloads with original name

🔬 Technical Specifications

Encryption Details

Algorithm:        AES-256-GCM
Key Size:         256 bits
Key Derivation:   PBKDF2-SHA256
Iterations:       200,000
Salt Size:        128 bits (16 bytes)
IV Size:          96 bits (12 bytes)
Tag Size:         128 bits (16 bytes)

Security Architecture

Salt: Random 16-byte value unique per file prevents rainbow table attacks
IV: Random 12-byte initialization vector ensures identical files encrypt differently
PBKDF2: Transforms passwords into cryptographic keys, resistant to brute force
GCM Mode: Provides both confidentiality and authenticity verification

🛡️ Security Guarantees

What We Protect

✅ File Contents – Encrypted with military-grade AES-256
✅ File Names – Original names only visible after decryption
✅ Metadata Privacy – No timestamps or user data stored
✅ Password Security – Never stored, logged, or transmitted
✅ Memory Safety – Automatic cleanup after processing

Attack Resistance

Brute Force Protection – 200,000 PBKDF2 iterations slow down attacks
Dictionary Attack Prevention – Unique salt per file
Pattern Analysis Immunity – Random IV ensures no patterns
Tampering Detection – GCM authentication tag verifies integrity
Side-Channel Resistance – Constant-time operations where possible

🔍 Privacy Features

Complete Transparency

100% open source code
Single HTML file – easy to audit
No minification – readable source
No obfuscation – full transparency
Standard Web Crypto API – trusted implementation

💡 Use Cases

Personal

🏥 Medical Records – Protect sensitive health information
💰 Financial Documents – Secure tax returns, statements
📸 Private Photos – Keep personal memories private
🔑 Password Backups – Encrypt password manager exports
📝 Personal Journals – Protect private thoughts

Professional

💼 Business Documents – Secure contracts and proposals
🏗️ Source Code – Protect proprietary algorithms
📊 Client Data – GDPR/HIPAA compliant storage
🎨 Creative Work – Protect designs before release
📧 Sensitive Communications – Encrypted email attachments

🚨 Security Best Practices

Password Guidelines

Use minimum 12 characters (longer is better)
Mix uppercase, lowercase, numbers, symbols
Avoid dictionary words or personal info
Use unique passwords for different files
Consider using a password manager

Operational Security

Never share passwords over insecure channels
Verify file integrity after decryption
Delete original files after encryption if needed
Store .enc files safely – they’re your only copy
Test decryption before deleting originals

⚠️ Important Warnings

⚠️ Password Loss = Data Loss
There is NO password recovery. If you forget your password, your data is permanently inaccessible. This is a security feature, not a limitation.

⚠️ Not a Backup Solution
Encryption is not backup. Always maintain separate backups of important data.

⚠️ Browser Compatibility
Requires modern browser with Web Crypto API support (Chrome 37+, Firefox 34+, Safari 11+)

🔧 Browser Requirements

Browser	Minimum Version	Recommended
Chrome	37+	Latest
Firefox	34+	Latest
Safari	11+	Latest
Edge	79+	Latest
Opera	24+	Latest

📊 Performance

Encryption Speed: ~50-100 MB/s (varies by device)
Memory Usage: Minimal (streams large files)
File Size Limit: None (browser memory dependent)
Processing: Utilizes hardware acceleration when available

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request. For major changes, please open an issue first to discuss what you would like to change.

Areas for Contribution

Additional encryption algorithms
Performance optimizations
UI/UX improvements
Localization/translations
Security audits

📜 License

This project is licensed under the GNU General Public License v3.0 – see the LICENSE file for details.

🙏 Acknowledgments

Web Crypto API developers for providing native cryptography
The cryptography community for AES and PBKDF2 standards
Open source contributors worldwide

🔐 Your Privacy is Not For Sale

Built with ❤️ for the privacy-conscious community

Live Demo | Report Bug

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