Visual CAPTCHA Challenge
0
Total Attempts
0
Successful
0%
Success Rate
Medium
Difficulty
How This CAPTCHA Works
Original CAPTCHA Principles:
- Distorted Text: Characters are randomly rotated, scaled, and positioned
- Visual Noise: Random lines and dots make OCR more difficult
- Color Variations: Multiple colors and gradients confuse automated readers
- Font Variations: Different font styles and sizes for each character
- Background Patterns: Complex backgrounds that interfere with text recognition
Implementation Features:
- Client-side generation using HTML5 Canvas
- Cryptographically secure random number generation
- Adaptive difficulty based on success rates
- Session-based challenge validation
- Anti-bot timing analysis