🔐 libsignal-node

Signal Protocol implementation for Node.js
Based on libsignal-protocol-javascript

✨ Modified & Enhanced by DanuZz
🚀 Mova - Nest™ | LK

📦 Overview

A secure ratcheting forward secrecy protocol designed for both synchronous and asynchronous messaging environments.

This ensures:

• 🔒 End-to-end encryption
• 🔁 Forward secrecy
• ⚡ Secure real-time & offline messaging

🔑 PreKeys

The protocol uses a concept called PreKeys.

A PreKey consists of:

• An ECPublicKey
• A unique ID stored on a server

How it works:

• At install time, clients generate:
  • ✅ One signed PreKey
  • ✅ Multiple unsigned PreKeys
• These keys are uploaded to the server for session initiation

🔗 Sessions

Signal Protocol is session-based.

Once a session is created:

• 🔐 All messages are encrypted/decrypted using that session
• ♾️ No need to manually terminate sessions

Session Establishment Methods:

1. PreKey Bundles

   • Retrieve recipient’s PreKeyBundle from server
   • Start a secure session

2. PreKey Signal Messages

   • Receive a message that automatically initializes a session

💾 State Management

Each session maintains important cryptographic state.

Required Storage:

• Identity State

  • Your identity key pair
  • Other users' identity keys

• PreKey State

  • Generated PreKeys

• Signed PreKey State

  • Signed PreKeys

• Session State

  • Active session data

⚠️ These must be stored securely and persistently

📜 License

Licensed under the MIT License

👨‍💻 Credits

• © 2015–2016 Open Whisper Systems
• © 2017–2018 Forsta Inc
• 🔧 Modified by DanuZz (Mova - Nest™ | LK)

💡 Notes

This project is a customized version of the original Signal protocol library, enhanced for better usability, performance, and integration in Node.js environments.

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