Google Introduces Private Analytics Technology Based on Cryptography and TEE

Google Research has introduced a new privacy-preserving analytics solution that combines the cryptographic secure aggregation protocol with Trusted Execution Environments (TEEs). The key innovation is a protocol that allows devices to send data in a single message, eliminating the need for lengthy multi-round interactions. The cryptographic layer ensures that individual data is never revealed, while TEEs provide attestation and transparency for computations. The solution has been deployed in Google's confidential federated analytics and is already used in Android SafetyCore to assess the accuracy of security models without accessing sensitive user content. The technology is based on a lattice-based cryptographic protocol, where clients encrypt data so that the server can only decrypt the aggregated value, with keys distributed among committees of clients. This combines mathematically provable security with hardware protection, providing a multi-layered security architecture.