CloudServices/FxChat

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Overview

Firefox Chat Service is messaging service that uses the Firefox Account keys to encrypt and sign message between people.

Project Contacts

Principal Point of Contact (EU)

• Tarek Ziade tarek@mozilla.com
• Alexis Metaireau alexis@mozilla.com
• Rémy Hubscher natim@mozilla.com

Goals

Having people being able to communicate using their phone or browser in a way that respects their privacy.

People can use one of their device to communicate with other people.

Requirements

Firefox Account

• People needs to log on the service using their Firefox Account.
• The Firefox Account assertion is used to register the public key on the server.
• The Firefox Account kB is used to build the public and private key for a user.

Workflow

Registration

• 1. Alice register her public key on the FxChat server
• 2. Bob register his public key on the FxChat server

Communication

Alice wants to send a message to Bob

• 1. Alice get Bob's devices public keys on the FxChat server
• 2. Alice encrypt her message usign Bob's devices public keys mixed with a temporary key pair she just build for this message.
• 3. Alice send the message to the server with the temporary public key
• 3. The server send the message to all Bob's devices
• 4. Alice encrypt her message using her device public key to sync her messages upon all her devices.

• 5. Each time I receive a message, I register a new device public key on the FxChat server.