Building a Privacy-First URL Shortener on Blockchain

说明与用途

一个隐私优先的 URL 缩短器，客户端加密 URL，存储在区块链上，服务器永不看到目标 URL。

问题

Traditional URL shorteners log user data, track browsing patterns, and sell data, creating privacy risks and a single point of failure.

结果

A fully functional, privacy‑first URL shortener that encrypts URLs client‑side, stores them immutably on a blockchain, and never exposes destination URLs to the server.

工作流

• Generate a random IV and AES-GCM key in the browser.
• Encrypt the destination URL client‑side using Web Crypto API.
• Send the ciphertext to a Cloudflare Worker endpoint.
• Store the ciphertext on the Cronos blockchain via the worker.
• When a user visits the short link, the worker fetches the ciphertext from the blockchain.
• The browser decrypts the ciphertext locally and redirects to the original URL.
• No server logs or analytics are collected.
• The system remains censorship‑resistant and tamper‑proof.

证据

Encrypted URL stored on Cronos blockchain

来源