Homoglyph Detector

About

**Protect Yourself from Homoglyph Phishing Attacks**

Homoglyph Detector is your shield against sophisticated phishing attacks that use Unicode lookalike characters to deceive users. These "homoglyphs" - visually identical characters from different alphabets - are commonly used by cybercriminals to create fake URLs and content that look legitimate.

**🔍 What Are Homoglyphs?**
Homoglyphs are characters that look identical but have different Unicode values. For example:
- Cyrillic 'а' (U+0430) looks exactly like Latin 'a' (U+0061)
- Greek 'ο' (U+03BF) appears identical to Latin 'o' (U+006F)
- Cyrillic 'р' (U+0440) mimics Latin 'p' (U+0070)

Attackers exploit these similarities to create deceptive domains like "рaypal.com" (using Cyrillic 'р') instead of "paypal.com" (using Latin 'p').

**🛡️ Key Features:**
- **Real-time Detection**: Automatically scans web pages as you browse
- **Visual Highlights**: Suspicious characters are marked with yellow background and red underline
- **Unicode Analysis**: Hover over detected characters to see detailed information including script type and potential lookalikes
- **Privacy-First**: All processing happens locally in your browser - no data is sent to external servers
- **Zero Performance Impact**: Efficient scanning with debounced processing
- **Built-in Testing**: Includes test page generator to verify detection capabilities

**🚀 How It Works:**
1. **Automatic Scanning**: The extension continuously monitors web page content
2. **Character Analysis**: Identifies suspicious Unicode characters that could be homoglyphs
3. **Visual Alerts**: Highlights detected characters with clear visual indicators
4. **Detailed Information**: Provides Unicode details and script analysis on hover

**💻 Perfect for:**
- Online banking and financial services
- E-commerce and shopping
- Email and messaging platforms
- Social media browsing
- Professional and educational websites
- Any situation where text authenticity matters

**🔒 Privacy & Security:**
- **No Data Collection**: We don't collect, store, or transmit any personal information
- **Local Processing**: All detection happens within your browser
- **Minimal Permissions**: Only accesses the current tab and stores your preferences
- **Open Source**: Transparent code available for review

**⚡ Easy to Use:**
- Install and forget - works automatically
- Simple toggle to enable/disable detection
- Manual scan option for on-demand checking
- Clear visual feedback when threats are detected

**Technical Details:**
- Supports detection of Cyrillic and Greek homoglyphs
- Covers the most commonly abused character substitutions
- Optimized for performance with minimal memory usage
- Compatible with all modern websites and web applications

Don't fall victim to sophisticated phishing attacks. Install Homoglyph Detector today and browse the web with confidence, knowing you're protected against Unicode-based deception tactics.

**Support & Feedback:**
Visit our GitHub repository for documentation, issues, and feature requests: https://github.com/pOH7/homoglyph-detector-extension

Stay safe online with Homoglyph Detector - your first line of defense against Unicode phishing attacks!