3 posts tagged with "cryptography"

In the ever-evolving landscape of digital communication, decentralization has emerged as a powerful concept with diverse interpretations and applications. This article explores our unique approach to decentralization in the context of a chat application, pushing the boundaries of what it means to be truly self-hosted and user-centric.

Our decentralized chat application reimagines the traditional centralized model by leveraging cutting-edge web technologies. Built as a Progressive Web App (PWA), it combines the best of both worlds - the accessibility of web applications and the rich functionality of native apps. What sets our approach apart is its commitment to operating independently of central servers, placing control firmly in the hands of users.

By prioritizing user privacy and data security, we've created an architecture that challenges conventional notions of chat applications. This article will take you on a deep dive into the innovative components and architectural decisions that form the backbone of our truly decentralized chat app, showcasing how we're redefining digital communication for the privacy-conscious era.

⚠️ WARNING: This document is not finished. The details in this document are subject to change.

The Signal Protocol has become the gold standard for end-to-end encrypted messaging, powering applications like WhatsApp, Signal, and Facebook Messenger. But what happens when you want to implement the same level of security in a truly peer-to-peer environment—one without centralized servers managing pre-keys and message routing?

In this article, we'll explore how to adapt the Signal Protocol's X3DH (Extended Triple Diffie-Hellman) key agreement and Double Ratchet algorithm for direct peer-to-peer communication over WebRTC. We'll discuss the challenges unique to P2P environments, propose practical solutions, and walk through a browser-based JavaScript implementation that maintains the security guarantees of the original protocol.

In digital communication, security and privacy are the major initials. Our latest project—a chat application built with JavaScript—aims to provide a robust communication platform fortified with industry-grade encryption. While we aspire to offer one of the most secure chat experiences available, declaring it "the most secure chat app in the world" might be premature. This article delves into the technology behind our app, current security measures, and the remaining challenges. We also welcome feedback to help refine our approach.