I Built Hush Relay: A Self-Hosted Encrypted Messenger Using Vanilla JavaScript and One PHP File

说明与用途

Hush Relay 是一个最小化的自托管即时通讯应用，运行在浏览器中，使用单个 PHP 文件进行加密消息中继，消除了账户、手机号和中心化基础设施的需求。

问题

How much infrastructure do two people actually need to exchange encrypted messages?

结果

Hush Relay demonstrates that a minimal server can provide end‑to‑end encrypted messaging without centralized identity services, using only a single PHP file and browser‑based cryptography.

工作流

• Generate a local cryptographic identity in the browser
• Create an invitation containing the public key, mailbox ID, and relay address
• Exchange invitation via QR code or link
• Send encrypted messages through the PHP relay
• Relay stores envelopes temporarily and routes them to the recipient's mailbox
• Recipient decrypts messages locally in the browser
• Use recovery words or device migration to restore or move accounts

证据

No phone numbers. No registration. No centralized messaging provider. No frontend build pipeline. Just a browser, encryption, and a lightweight relay you can host yourself.

来源

The relay is intentionally limited in responsibility. It accepts encrypted message envelopes, stores them temporarily, delivers them to the appropriate mailbox, and removes acknowledged or expired messages.

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Hush Relay uses the browser's native WebCrypto API.

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The repository includes deployment instructions for shared hosting, VPS environments, Android/Termux, and IPFS-based distribution of the static client.

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