Privacy Sandbox v2 Evolution Engine
Chrome's Privacy Sandbox is Google's initiative to replace third-party cookies. KeLAAX V13 fully simulates all Privacy Sandbox APIs for complete browser authenticity.
What is Privacy Sandbox?
Privacy Sandbox is a set of browser APIs that enable:
- Topics API: Interest-based advertising without tracking
- Attribution Reporting: Conversion measurement without cookies
- Protected Audience (FLEDGE): On-device ad auctions
- Shared Storage: Cross-site data with privacy protections
Why It Matters: Websites and ad networks increasingly check for Privacy Sandbox API responses. A browser without authentic responses may be flagged as suspicious.
KeLAAX Privacy Sandbox Simulation
Topics API v2
The Topics API assigns interest categories based on browsing history.
| Feature | KeLAAX Implementation |
|---|---|
| Topic Categories | 350+ topics from extended taxonomy |
| Epoch Evolution | Natural topic changes over 3-week epochs |
| Persona Consistency | Topics match profile's browsing history |
| Top-Level Topics | 5 top topics per user |
Attribution Reporting API
Simulates conversion attribution without cross-site tracking.
| Feature | KeLAAX Implementation |
|---|---|
| Source Registration | Click/view attribution sources |
| Trigger Registration | Conversion event handling |
| Report Generation | Authentic attribution reports |
| Privacy Noise | Appropriate differential privacy |
Protected Audience (FLEDGE)
On-device ad auction simulation.
| Feature | KeLAAX Implementation |
|---|---|
| Interest Groups | Persona-based interest group membership |
| Bidding Signals | Realistic bidding behavior |
| Auction Results | Authentic auction outcomes |
| K-Anonymity | Proper anonymity thresholds |
Shared Storage API
Cross-origin data storage with privacy.
| Feature | KeLAAX Implementation |
|---|---|
| Storage Operations | Set, get, delete operations |
| Output Gates | Select URL, run function gates |
| Worklet Support | Shared storage worklet simulation |
Persona Consistency
All Privacy Sandbox responses are consistent with the profile's persona:
Profile: Tech Enthusiast, Male, 25-34, US
├── Topics: Technology, Software, Gaming
├── Interest Groups: Electronics, Coding Tools
├── Attribution: Tech-related conversions
└── Shared Storage: Tech site preferences
This consistency prevents detection through cross-API analysis.
Natural Evolution
Privacy Sandbox data evolves naturally over time:
| Timeline | Evolution |
|---|---|
| Week 1 | Initial topics based on browsing |
| Week 2-3 | Topic refinement with epoch boundary |
| Week 4 | New topics emerge, old ones fade |
| Ongoing | Interest groups update with behavior |
Chrome 134 Readiness
The Privacy Sandbox v2 module is already prepared for Chrome 134 features:
- WebGPU Shading Language (WGSL) 2.0 fingerprints
- Extended Topics taxonomy (350+ topics)
- New Sec-CH-Viewport-Width Client Hint
- Speculation Rules API enhancements
Configuration
Privacy Sandbox simulation is enabled by default in V13. To configure:
- Navigate to Settings → Stealth
- Find Privacy Sandbox v2 section
- Options:
- Auto (recommended): Matches Chrome behavior
- Always On: Force Privacy Sandbox responses
- Always Off: Disable Privacy Sandbox APIs
Recommendation: Use "Auto" mode for maximum authenticity.
Verification
Test your Privacy Sandbox simulation:
- Run a session with DevTools open
- Go to Application → Privacy Sandbox
- Verify Topics, Attribution, and Protected Audience data
- Compare with a real Chrome profile
Related Documentation
- Fingerprint Spoofing - Browser fingerprinting
- Technical Specifications - Full tech specs
- Device Birth Date System - Profile authenticity