What we learned about TEE security from auditing WhatsApp's Private Inference
7 hours ago
- #TEE Security
- #Confidential Computing
- #WhatsApp Audit
- WhatsApp's Private Inference feature uses TEEs to process encrypted messages for AI features, with vulnerabilities identified and patched before launch.
- Key lessons include: never trust data outside measurement, verify ACPI tables, correctly check firmware patch levels, and ensure attestations have freshness guarantees.
- Meta addressed 28 issues, with 16 fully resolved; remaining unresolved issues are low severity with documented justifications.
- Audit highlights that TEEs are not a silver bullet, requiring rigorous implementation, comprehensive testing, and early security reviews.