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、Cronos 区块链存储和浏览器解密，消除了服务器端跟踪。

问题

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

结果

Cryptly provides a privacy‑first URL shortener where no server logs user data, the data is stored immutably on a blockchain, and decryption occurs entirely in the browser, eliminating tracking and single points of failure.

工作流

• 1. User enters a URL in the Cryptly web interface.
• 2. The browser generates a random IV and derives an AES‑GCM key.
• 3. The URL is encrypted with Web Crypto API and the IV.
• 4. The encrypted payload is sent to a Cloudflare Worker.
• 5. The Worker writes the encrypted data to the Cronos blockchain via a smart contract.
• 6. The Worker returns a short code to the user.
• 7. When the short code is visited, the Worker fetches the encrypted payload from the blockchain.
• 8. The browser decrypts the payload locally and redirects to the original URL.

证据

Encrypted URL stored on Cronos blockchain

来源

Server never sees destination

来源