J-Chat 2

J-Chat 2 is a secure, persistent, and aesthetically distinct messaging application designed with a strict Monochrome Design Philosophy. It prioritizes user privacy through End-to-End Encryption (E2EE) and Salted Password Hashing.

📸 Features

• Monochrome UI: A strict black-and-white aesthetic using DotGothic16 typography.
• End-to-End Encryption: Messages are encrypted using derived keys (Password + Partner ID). Even the server administrator cannot read your messages.
• Instant Sync: Uses Long Polling architecture for real-time, battery-efficient communication.
• Secure Identity: Passwords are protected using Scrypt with unique per-user salts.
• Right to be Forgotten: One-click account deletion permanently wipes data from both client and server.

🚀 Installation

1. Server

   cd server
   npm install
   node index.js
   

2. Client

   # From root
   npm install
   npm run dev
   

🛠️ Technology Stack

• Frontend: React (TypeScript), TailwindCSS, Vite
• Backend: Node.js, Express, Better-SQLite3
• Security: AES-256 (Client), Scrypt (Server)

👨‍💻 Author

Jubayer Samse Alif Developer & Researcher Email: jubayer.alif2021@gmail.com

📄 Citation

BibTeX:

@software{alif2026jchat2,
  author = {Alif, Jubayer Samse},
  title = {J-Chat 2: A Privacy-Oriented Messaging Application},
  year = {2026},
  publisher = {Zenodo},
  version = {2.1.0},
  doi = {10.5281/zenodo.18606793},
  url = {[https://doi.org/10.5281/zenodo.18606793](https://doi.org/10.5281/zenodo.18606793)}
}