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，服务器无法看到目标 URL，避免了跟踪和数据泄露。

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 where the server never sees the destination URL, no tracking occurs, and data is stored immutably on a blockchain, reducing risk of data leaks and censorship.

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 to a Cloudflare Worker endpoint.
• Store the ciphertext on the Cronos blockchain via the worker.
• When a user visits the short link, the worker retrieves 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