Building a Privacy-First URL Shortener on Blockchain

说明与用途

构建了一个基于区块链的隐私优先 URL 缩短器，使用客户端加密和 Cronos 区块链存储，消除服务器日志记录和单点故障。

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

Cryptly provides a privacy‑first URL shortener that eliminates server‑side logging, removes a single point of failure, and offers censorship‑resistance via blockchain storage.

工作流

• Generate a random IV and AES‑GCM key in the browser
• Encrypt the destination URL with Web Crypto API
• Send the ciphertext and IV to a Cloudflare Worker
• Worker writes the ciphertext to the Cronos blockchain via a smart contract
• User accesses the short URL, Worker retrieves ciphertext from blockchain
• Browser fetches ciphertext, decrypts locally, and redirects to the original URL

证据

Encrypted URL stored on Cronos blockchain

来源

Server never sees destination

来源