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A visual representation of privacy and consent management, featuring icons of locks for security, shields for protection, checkmarks for compliance, arrows for data flow, globes for global reach, and cookies/pixels to symbolize tracking technologies, all interconnected to illustrate the importance of GDPR and CCPA regulations in script blocking and user privacy.

OneTrust Script Blocking

Table of Contents​

Overview​

Automatic script blocking is a critical feature of OneTrust that prevents tracking scripts from loading until users provide appropriate consent. This guide covers how to configure and manage script blocking to ensure compliance with privacy regulations and respect for user choices.

Why Script Blocking Matters​

  • GDPR: Requires consent before processing personal data
  • CCPA/CPRA: Requires opt-out mechanisms for data sharing
  • State Laws: Multiple states have consent requirements

User Privacy​

  • Prevents unauthorized tracking
  • Respects user consent choices
  • Protects user privacy preferences

Technical Benefits​

  • Prevents data leakage
  • Ensures proper consent flow
  • Maintains site performance

Enabling Script Blocking​

Step 1: Access Script Management​

  1. Navigate to OneTrust Admin

    • Go to Admin → Data Governance → Cookie Compliance
    • Or use: https://yourcompany.onetrust.com/app/admin/

  2. Access Script Management

    • Go to Scripts → Script Management
    • Look for "Automatic Script Blocking" settings
    • Enable script blocking if not already enabled

Step 2: Configure Blocking Settings​

  1. Global Blocking Settings

    • Enable Automatic Blocking: Turn on script blocking
    • Blocking Mode: Choose blocking strategy
    • Default Behavior: Set default blocking state

  2. Blocking Modes

    • Strict: Block all non-necessary scripts until consent
    • Selective: Block based on category and consent
    • Custom: Configure custom blocking rules

Script Categorization​

Step 1: Identify Scripts​

  1. Website Scripts

    • Analytics scripts (Google Analytics, etc.)
    • Marketing scripts (Facebook Pixel, etc.)
    • Advertising scripts (Google Ads, etc.)
    • Functionality scripts (chat widgets, etc.)

  2. Third-Party Scripts

    • Social media widgets
    • Payment processors
    • Customer support tools
    • External services

Step 2: Categorize Scripts​

  1. Necessary Scripts

    • Essential for website function
    • Cannot be blocked
    • Examples: security scripts, load balancers

  2. Analytics Scripts

    • Website performance monitoring
    • User behavior analysis
    • Requires analytics consent

  3. Marketing Scripts

    • Advertising and marketing
    • Retargeting and conversion tracking
    • Requires marketing consent

  4. Functionality Scripts

    • Enhanced user experience
    • Optional features
    • Requires functionality consent

  5. Personalization Scripts

    • User preference management
    • Personalized content
    • Requires personalization consent

Configuring Blocking Rules​

Step 1: Category-Based Blocking​

  1. Necessary Scripts

    • Blocking: Never blocked
    • Consent: Not required
    • Purpose: Essential functionality

  2. Analytics Scripts

    • Blocking: Blocked until analytics consent
    • Consent: Analytics consent required
    • Purpose: Website analytics

  3. Marketing Scripts

    • Blocking: Blocked until marketing consent
    • Consent: Marketing consent required
    • Purpose: Marketing and advertising

  4. Functionality Scripts

    • Blocking: Blocked until functionality consent
    • Consent: Functionality consent required
    • Purpose: Enhanced functionality

  5. Personalization Scripts

    • Blocking: Blocked until personalization consent
    • Consent: Personalization consent required
    • Purpose: Personalization

Step 2: Advanced Blocking Rules​

  1. Conditional Blocking

    • Block based on user location
    • Block based on user type
    • Block based on page context

  2. Dependency Management

    • Handle script dependencies
    • Manage loading order
    • Configure fallback behaviors

  3. Performance Optimization

    • Lazy load non-critical scripts
    • Optimize loading sequence
    • Minimize blocking impact

Script Implementation​

Step 1: Add Scripts to OneTrust​

  1. Manual Addition

    • Go to Scripts → Add Script
    • Enter script details
    • Set appropriate category
    • Configure blocking rules

  2. Script Information

    • Name: Descriptive script name
    • URL: Script source URL
    • Category: Appropriate consent category
    • Purpose: What the script does

Step 2: Configure Script Properties​

  1. Loading Behavior

    • Load Order: When to load the script
    • Dependencies: Other scripts required
    • Fallback: What to do if script fails

  2. Consent Requirements

    • Required Consent: Which consent categories
    • Consent Logic: How to handle consent
    • Default State: What to do without consent

Step 3: Test Script Blocking​

  1. Without Consent

    • Verify scripts are blocked
    • Check browser network tab
    • Verify no unauthorized requests

  2. With Consent

    • Accept appropriate consent
    • Verify scripts load properly
    • Check script functionality

Privacy Signal Integration​

Step 1: GPC Signal Handling​

  1. Enable GPC Processing

    • Go to Settings → Privacy Signals
    • Enable "Process GPC Signals"
    • Configure GPC behavior

  2. Script-Level GPC Settings

    • Configure each script to respect GPC
    • Set appropriate GPC actions
    • Test GPC signal handling

Step 2: DNT Signal Handling​

  1. Enable DNT Processing

    • Enable "Process DNT Signals"
    • Configure DNT behavior
    • Set up DNT response rules

  2. Script-Level DNT Settings

    • Configure each script for DNT
    • Set appropriate DNT actions
    • Test DNT signal handling

Advanced Configuration​

Step 1: Custom Blocking Logic​

  1. JavaScript Integration

    // Example: Custom script blocking logic
    if (OneTrust.IsAlertBoxClosed() && OneTrust.IsAlertBoxClosedAndValid()) {
      // Load marketing scripts
      loadMarketingScripts();
    } else {
      // Block marketing scripts
      blockMarketingScripts();
    }

  2. Event-Based Blocking

    // Example: Event-based script loading
    OneTrust.OnConsentChanged(function() {
      if (OneTrust.IsAlertBoxClosedAndValid()) {
        // User has given consent, load scripts
        loadConsentedScripts();
      }
    });

Step 2: Performance Optimization​

  1. Lazy Loading

    • Load scripts only when need
    • Defer non-critical scripts
    • Optimize loading sequence

  2. Resource Management

    • Monitor script performance
    • Optimize script sizes
    • Minimize blocking delays

Testing and Validation​

Step 1: Functional Testing​

  1. Blocking Effectiveness

    • Verify scripts block without consent
    • Verify scripts load with consent
    • Test category-specific blocking

  2. Consent Integration

    • Test consent collection
    • Verify consent respect
    • Test consent updates

Step 2: Privacy Signal Testing​

  1. GPC Testing

    • Use GPC browser extensions
    • Verify GPC signal respect
    • Test script-level GPC handling

  2. DNT Testing

    • Enable DNT in browser
    • Verify DNT signal respect
    • Test script-level DNT handling

Step 3: Performance Testing​

  1. Loading Performance

    • Measure page load times
    • Monitor script loading
    • Check blocking impact

  2. User Experience

    • Test site functionality
    • Verify user interactions
    • Check for broken features

Common Issues and Solutions​

Issue 1: Scripts Not Blocking​

Cause: Automatic blocking not enabled or rules not configured Solution: Enable automatic blocking and configure blocking rules

Cause: Script configuration issues or consent logic problems Solution: Check script configuration and consent logic

Issue 3: Performance Issues​

Cause: Inefficient blocking or loading strategies Solution: Optimize blocking rules and loading sequence

Issue 4: Privacy Signals Not Working​

Cause: Privacy signal handling not configured at script level Solution: Configure GPC and DNT handling for each script

Best Practices​

1. Start with Strict Blocking​

  • Block all non-necessary scripts by default
  • Gradually allow scripts based on consent
  • Test thoroughly before going live

2. Categorize Accurately​

  • Don't misclassify scripts to avoid consent
  • Use appropriate categories for each script
  • Regularly review and update categorizations

3. Test Thoroughly​

  • Test in multiple browsers
  • Test with different consent scenarios
  • Validate with privacy tools

4. Monitor Performance​

  • Track script loading performance
  • Monitor user experience impact
  • Optimize based on data

Monitoring and Maintenance​

1. Regular Audits​

  • Monthly script reviews
  • Quarterly blocking rule audits
  • Annual compliance reviews

2. Performance Monitoring​

  • Monitor script loading times
  • Track blocking effectiveness
  • Monitor user experience impact

3. Compliance Monitoring​

  • Monitor regulatory changes
  • Update blocking rules accordingly
  • Ensure ongoing compliance

Rember: Effective script blocking is essential for privacy compliance and user trust. Take the time to configure blocking rules properly and test thoroughly.