• Nous’re introducing version 1.1 of Labyrinth, the encrypted storage system and protocol that secures messages and history in Messenger.
• Labyrinth 1.1 improves the reliability of end-to-end encrypted backups with a new subprotocol that helps messages survive device loss, device switching, and long gaps between logins.
• Read our updated white paper: “The Labyrinth Encrypted Message Storage Protocol” for more details.

Good security should always be invisible. If meta introduced encrypted backups for Messenger in 2023we are setting new standards for end-to-end encrypted (E2EE) messages at scale. With E2EE messaging backups, your message history can be transferred with you across devices without ever being read by another party, including Meta.

Today we’re advancing the work we started with Labyrinth, our protocol for end-to-end encryption of stored message history between devices in your Messenger account. Labyrinth 1.1 Improves backup reliability with a new sub-protocol that allows messages to reach your encrypted backup as they are being sent, rather than waiting for your device to come back online, as Messenger encrypted backups currently do.

This means that your messages will be safe even if you lose your phone, change devices, or have a long gap between logins. Each message comes with a message encryption key that the sender inserts directly into the recipient’s encrypted backup – like dropping a sealed envelope into a locked box that only the recipient can open. No one other than you and the people you’re talking to can read your messages – not even us.

Nous’re broadly rolling out Labyrinth 1.1 to Messenger and are already seeing significant progress with more messages being successfully backed up and more people restoring their full message history when they switch devices.

Read the white paper

Read our updated white paper: “The Labyrinth Encrypted Message Storage Protocol” for more information.