Building a Privacy-First URL Shortener on Blockchain

说明与用途

Cryptly是一个隐私优先的URL缩短服务，使用区块链技术。通过Web Crypto API在客户端使用AES-GCM加密，将加密数据存储在Cronos区块链上，服务器永远不会看到目标URL。

问题

Traditional URL shorteners like bit.ly log user IP addresses, timestamps, user agents, track browsing patterns, and sell this data to advertisers. Their centralized databases are also vulnerable to hacks.

结果

Cryptly provides a privacy-preserving URL shortener where the server never sees destination URLs, eliminating tracking, analytics, and centralized data storage vulnerabilities.

工作流

• User encrypts destination URL using Web Crypto API (AES-GCM) in browser
• Encrypted URL is stored on Cronos blockchain
• When shortened link is clicked, browser fetches encrypted data from blockchain
• Browser decrypts URL locally using stored key
• User is redirected to destination without server ever seeing the original URL

证据

Server never sees destination URLs - No tracking, no analytics - No database to leak - Censorship-resistant (blockchain)

来源

const encrypted = await crypto.subtle.encrypt({ name: "AES-GCM", iv: iv }, key, urlBuffer);

来源