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Labyrinth 1.1: Making End-to-End Encrypted Backups Even More Reliable

Labyrinth 1.1 improves Meta's Messenger encrypted backups with a new sub-protocol enabling immediate message backup independent of device connection status.

How Meta Is Strengthening End-to-End Encrypted Backups

Meta strengthens end-to-end encrypted backups through improvements to its HSM-based Backup Key Vault system.

Production Engineering

Post-Quantum Cryptography Migration at Meta: Framework, Lessons, and Takeaways

Meta shares its post-quantum cryptography migration strategy and introduces PQC Migration Levels framework to help organizations assess quantum readiness.

Trust But Canary: Configuration Safety at Scale

Meta discusses safe configuration rollouts at scale using canary deployments and progressive rollouts.

Data Infrastructure

DevInfra

Production Engineering

Patch Me If You Can: AI Codemods for Secure-by-Default Android Apps

Meta's Product Security team describes their AI-powered approach to securing Android apps at scale across millions of lines of code.

How Advanced Browsing Protection Works in Messenger

This post explains the cryptographic infrastructure behind Advanced Browsing Protection (ABP) in Messenger, which detects malicious links without exposing user query data to the server.

No Display? No Problem: Cross-Device Passkey Authentication for XR Devices

Meta Engineering presents a novel approach to enable cross-device passkey authentication for XR devices and other screenless hardware without requiring QR codes.

Rust at Scale: An Added Layer of Security for WhatsApp

WhatsApp rolled out a Rust-based media validation library to billions of devices as a defense-in-depth security layer against malicious files.

Security & Privacy