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

Labyrinth 1.1 improves end-to-end encrypted backup reliability for Messenger. This update introduces a new sub-protocol to ensure messages are preserved across device changes and prolonged sign-in gaps, enhancing data resilience for users.

Meta Engineering·May 11, 2026

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