10 AI-proof challenges · 28 behavioral signals · 7 defense layers · Zero-trust architecture
Interact with the widget and configure it in real-time
v4.0 Fortress · 28 signals · 10 challenges
Low risk — human detected
28 behavioral signals · AI-resistant challenges
Each challenge exploits a fundamental gap in AI capabilities
AI struggles with adversarial noise patterns designed to confuse computer vision while remaining intuitive to humans.
Requires holistic scene understanding and intuition that neural networks fundamentally lack.
Real-time physics simulation demands embodied understanding of gravity and balance.
Sequential memory tasks exploit human episodic memory which AI cannot replicate authentically.
Adversarial illusions trick AI vision systems while humans naturally see through them.
Rhythmic pattern reproduction requires natural timing variance that bots cannot mimic.
Drawing gestures with natural motor variance is uniquely human and impossible to replay.
Requires common-sense understanding of physical world causality that AI lacks.
Real-time 3D object manipulation demands spatial reasoning no bot can fake.
Cryptographic proof-of-work combined with visual challenge creates an impossible barrier for AI.
Behavioral signals organized by category — each weighted and anomaly-scored
Each layer independently blocks attacks — a single bypass is never enough
40+ detection vectors for headless browsers, automation frameworks, and bot fingerprints.
28 behavioral signals analyzed via Bayesian scoring before any challenge is shown.
Challenge type and difficulty dynamically chosen based on real-time risk assessment.
One of 10 AI-proof challenges presented with behavioral verification during interaction.
High-risk sessions require cross-device verification via encrypted QR code.
Hardware-backed authentication as an optional additional verification layer.
JWT HMAC-SHA256 token issued with session fingerprint and risk score embedded.
Drop-in integration for any web project
<!-- Add to your HTML --> <div id="captcha-shield"></div> <script src="https://smouj.github.io/captcha-shield/v4/widget.js"></script>
Real-time verification analytics, challenge distribution, risk scoring, and signal anomaly monitoring
Fortress Analytics Dashboard
No challenge data yet
No risk data yet
No layer data yet
No activity recorded yet
Complete CAPTCHA verifications to see activity here
Where we are and where we're going
10 challenges, 28 signals, 7 defense layers, JWT tokens
TensorFlow.js Lite on-device ML model for real-time bot scoring
WebAssembly challenge modules for near-native performance
Multi-tenant SaaS platform with team management and billing