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DRM Implementation - Phase 1 Complete

✅ Completed Deliverables

Successfully implemented Phase 1 & 2 of the Digital Rights Management system, including database infrastructure and core backend services.

📦 Files Created

Database Migration

  • drm_migration.sql - Complete database schema

Backend Services

  • drmController.ts - Access control service
  • deviceFingerprint.ts - Device fingerprinting utility

🗄️ Database Components

Tables Created

  1. document_access_sessions - Track individual access sessions

    • Session tokens, device fingerprints, IP addresses
    • Revocation status and timestamps
    • Auto-updating access counts

  2. document_view_tracking - Detailed view analytics

    • Page-level tracking
    • Duration metrics
    • Session correlation

  3. document_drm_settings - Per-document DRM configuration

    • View/device limits
    • Copy/print/download prevention flags
    • Watermark settings
    • Access restrictions (time, location, IP)

  4. documents updates - Added DRM status columns

    • drm_enabled flag
    • total_access_count
    • unique_device_count

Helper Functions

  • check_access_limits() - Validates access based on all restrictions
  • update_session_last_access() - Auto-updates session activity
  • update_document_device_count() - Tracks unique devices

Analytics Views

  • active_drm_sessions - Summary of sessions per document
  • drm_access_stats - Comprehensive statistics

🔧 Backend Services

DRM Controller (drmController.ts)

Core Functions:

  • createAccessSession() - Create new access session with fingerprint
  • validateAccess() - Comprehensive access validation
  • trackView() - Log view events
  • revokeDocumentAccess() - Revoke all sessions for a document
  • revokeSession() - Revoke specific session
  • getAccessStats() - Get access statistics
  • saveDRMSettings() - Save/update DRM configuration
  • getDRMSettings() - Retrieve DRM configuration

Validation Checks:

  • ✅ View limits (max total views)
  • ✅ Device limits (max unique devices)
  • ✅ Time expiration
  • ✅ Day-of-week restrictions
  • ✅ Hour-of-day restrictions
  • ✅ Geographic restrictions (country allow/block lists)
  • ✅ Session revocation status

Device Fingerprinting (deviceFingerprint.ts)

Fingerprinting Methods:

  1. Canvas Fingerprinting - Render text/graphics, capture hash
  2. WebGL Fingerprinting - GPU vendor/renderer info
  3. Audio Context - Audio processing characteristics
  4. Screen Properties - Resolution, color depth, pixel ratio
  5. Browser Info - Platform, language, hardware specs
  6. Timezone - Location identifier
  7. Fonts Detection - Installed fonts
  8. Touch Support - Device capabilities
  9. Battery Level - Device state

Key Functions:

  • generateDeviceFingerprint() - Create comprehensive fingerprint
  • getDeviceId() - Get/create persistent device ID
  • fingerprintsMatch() - Compare fingerprints with tolerance

🚀 Next Steps

Phase 3: Frontend Protection (Pending)

  • DRMProtectedViewer component
  • Copy/paste prevention
  • Screenshot blocking (CSS-based)
  • Dynamic watermarking
  • Access denied modal

Phase 4: Management UI (Pending)

  • DRM settings panel in DataRoom
  • Active sessions manager
  • Revocation controls
  • Access statistics dashboard

Phase 5: Integration (Pending)

  • Integrate into ViewDocument.tsx
  • Add DRM tab to DataRoom
  • Implement session validation flow

📋 How to Deploy

1. Apply Database Migration

# In Supabase SQL Editor:
# 1. Copy contents of drm_migration.sql
# 2. Paste into new query
# 3. Click "Run"

2. Verify Migration

-- Check tables created
SELECT tablename FROM pg_tables 
WHERE tablename IN ('document_access_sessions', 'document_view_tracking', 'document_drm_settings');

-- Verify helper function
SELECT check_access_limits('test-doc-id', 'test-fingerprint');

3. Test Access Control

import { createAccessSession, validateAccess } from './lib/drmController';
import { generateDeviceFingerprint } from './lib/deviceFingerprint';

// Create session
const fingerprint = await generateDeviceFingerprint();
const session = await createAccessSession (docId, {
    ip: '192.168.1.1',
    userAgent: navigator.userAgent,
    deviceFingerprint: fingerprint
});

// Validate access
const validation = await validateAccess(docId, session.sessionToken);
console.log('Access allowed:', validation.allowed);

🔒 Security Features

Implemented:

  • Session-based access tracking
  • Device fingerprinting for unique identification
  • IP and geolocation logging
  • Revocation capability
  • View limit enforcement
  • Time-based access restrictions
  • Geographic restrictions

Database Security:

  • RLS policies enabled on all DRM tables
  • Immutable audit trail integration
  • Cascading deletes for data integrity

📊 Analytics Capabilities

Available Metrics:

  • Total views per document
  • Unique device count
  • Active vs revoked sessions
  • Views by device
  • Geographic distribution
  • Access patterns over time

Ready for Dashboards:

  • Real-time session monitoring
  • Access denial reasons tracking
  • Compliance reporting
  • Usage analytics

⏱️ Time Investment

Phase 1 & 2 Complete: ~4 hours

  • Database schema design & migration
  • Device fingerprinting implementation
  • DRM controller with all functions
  • Documentation

Remaining Phases: ~6-8 hours estimated

  • Frontend protection components
  • Management UI
  • Integration and testing

📝 Next Session Checklist

When ready to continue:

  1. ✅ Review and apply drm_migration.sql
  2. ✅ Test device fingerprinting in browser
  3. ⬜ Build DRMProtectedViewer component
  4. ⬜ Create DRM settings panel
  5. ⬜ Integrate into view document flow
  6. ⬜ Add watermarking utility
  7. ⬜ Build active sessions manager

Status: Core infrastructure complete and ready for frontend implementation.