implementing-browser-isolation-for-zero-trust

# Implementing Browser Isolation for Zero Trust ## When to Use - When deploying remote browser isolation as part of a Zero Trust security architecture - When protecting users from zero-day browser exploits and drive-by downloads - When implementing content disarming and reconstruction for file downloads - When enforcing data loss prevention policies for web browsing sessions - When securing access to untrusted or uncategorized websites - When integrating browser isolation with existing SWG and ZTNA infrastructure - When protecting against phishing and credential theft via isolated rendering ## Prerequisites - Familiarity with Zero Trust architecture principles and network security - Understanding of Secure Web Gateway (SWG) and proxy deployment models - Access to a test or lab environment for policy validation - Python 3.8+ with required dependencies installed - DNS and proxy infrastructure for traffic routing ## Instructions ### Phase 1: URL Categorization and Risk Classification Build a URL categorization engine that classifies websites by risk level to determine isolation policy. URLs are scored based on threat intelligence feeds, domain reputation, content category, and historical risk indicators. ```python from agent import BrowserIsolationPolicyEngine engine = BrowserIsolationPolicyEngine( organization="Acme Corp", default_isolation_mode="isolate_risky", ) # Classify a URL and determine isolation action result = engine.classify_url("https://docs.google...