Building a Privacy-First URL Shortener on Blockchain

说明与用途

构建了一个隐私优先的 URL 缩短器，使用客户端加密并将加密后的 URL 存储在 Cronos 区块链上，避免了数据收集和单点故障。

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

The system achieves privacy‑first URL shortening with immutable storage, no centralized database, and censorship resistance.

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 endpoint.
• Store the ciphertext on the Cronos blockchain via the worker.
• When a short URL is visited, the worker fetches the ciphertext from the blockchain.
• The browser decrypts the ciphertext locally using the same key and IV.
• Redirect the user to the decrypted URL.

证据

Encrypted URL stored on Cronos blockchain

来源

Server never sees destination

来源