Sentinel Layer | Continuous Session Security & Real-Time Threat Detection

Traditional authentication stops at the login gate. Sentinel Layer protects what happens after: continuous post-login session security that monitors behavioral biometrics, device fingerprints, impossible travel velocities, and network origins to stop session hijacking, credential theft, and automated account takeovers in real time.

The Post-Login Verification Gap

When a user logs in with passwords, MFA, or SSO, a session cookie or JWT token is granted. If that token is stolen through info-stealer malware, malicious browser extensions, or AiTM phishing proxies, attackers impersonate the legitimate user without needing passwords.

Sentinel Layer solves this by evaluating continuous telemetry without storing passwords or plaintext keystroke values. Every session interaction is scored against established behavioral baselines in under 15 milliseconds.

Core Platform Safeguards & Anomaly Detection

  • Impossible Travel Velocity: Detects physical travel impossibilities (e.g. London to Tokyo in 15 minutes) using Haversine geodesic distance and speed thresholds (>900 km/h).
  • Behavioral Biometrics: Evaluates typing cadence (dwell time, flight time) and cursor kinematics to differentiate organic human users from headless automation scripts.
  • Hardware & Device Fingerprinting: Continuously validates canvas, WebGL, timezone, and platform parameters to identify cookie replay across unauthorized machines.
  • Adaptive Step-Up MFA: Bayesian scoring dynamically escalates to step-up authentication only when high-risk anomalies occur (scores 60–79), providing a frictionless experience for 99% of valid sessions.
  • Cross-Tenant Threat Network: Collaborative zero-knowledge defense sharing salted malicious indicators with automatic score decay.

Quickstart Integration for Developers

Instrument your application in 15 minutes with our client SDK and a simple backend proxy route:

npm install @sentinellayer/react

Forward telemetry securely to https://api.sentinellayer.in/evaluate with your private API key to receive risk scores, confidence ratings, and automated enforcement verdicts (ALLOW, MONITOR, STEP_UP_AUTH, TERMINATE_SESSION).

Developer & Agent Resources

Explore machine-readable files and developer references: