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Vincent 5fbbdc33c3 Signal branding
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Signal Messenger

Build Status

Signal Messenger allows for truly decentralized, end to end, and private encrypted chats. Signal Messenger is built to handle both online and fully Asynchronous offline messages. Loki messenger implements the Signal protocol for message encryption. Our Client interface is a fork of Signal Messenger. All communication that passes through Loki messenger is routed through Lokinet.

Summary

Loki messenger integrates directly with Loki Service Nodes, which are a set of distributed, decentralized and Sybil resistant nodes. Service Nodes act as both federated servers which store messages offline, and a set of nodes which allow for onion routing functionality obfuscating users IP Addresses. For a full understanding of how Loki messenger works, read the Loki whitepaper.

Online Messages

If Alice and Bob are both online they can simply resolve each others public keys, to introduction sets, this functionality is handled by interfacing with Lokinet. With the appropriate introduction sets Alice and Bob can create a path and using onion routing pass messages through the Loki network without giving away personally identifiable information like their IP address.

Offline messages

Offline messaging uses Swarms, given any users public key the user can resolve a public key to a specific grouping of Service Nodes (AKA Swarm) each user in Signal Messenger belongs to a Swarm. When routing a message offline the user selects a Service node in the destination users Swarm, when the user comes online they query any node in their Swarm, if the Swarm is holding any messages for the user they disseminate those messages to the user.

Swarm Messaging

Spam protections for Signal Messenger are based on a Proof of Work which is attached to any message that exceeds a default size or Time To Live, this process is discussed further in the Loki whitepaper.

Want to Contribute? Found a Bug or Have a feature request?

Please search for any existing issues that describe your bugs in order to avoid duplicate submissions. Submissions can be made by making a pull request to our development branch, if you don't know where to start contributing , try reading the Github issues page for ideas.

Build instruction

Build instructions can be found in CONTRIBUTING.md.

License

Copyright 2018- Current, Loki Foundation Copyright 2014-2018, Open Whisper Systems Licensed under the GPLv3: http://www.gnu.org/licenses/gpl-3.0.html