Building a Privacy-First URL Shortener on Blockchain

说明与用途

作者构建了 Cryptly，一个注重隐私的 URL 缩短器，使用 Cronos 区块链和客户端 AES-GCM 加密。这防止了跟踪和数据泄露，因为服务器永远看不到目标 URL。

问题

Traditional URL shorteners like bit.ly compromise user privacy by logging IPs, timestamps, user agents, and destination URLs, tracking browsing patterns, selling data to advertisers, and maintaining centralized databases vulnerable to hacking.

结果

A privacy-first URL shortener named Cryptly was created, ensuring that destination URLs remain encrypted until decrypted locally in the user's browser, eliminating server-side tracking and central database vulnerabilities.

工作流

• Client-side encryption of the destination URL using AES-GCM via the Web Crypto API.
• Storage of the encrypted URL on the Cronos blockchain for immutable, decentralized record-keeping.
• Browser fetches the encrypted data from the blockchain.
• Local decryption of the URL in the browser using the Web Crypto API.
• Redirection to the destination URL without the server ever processing the final link.

证据

Server never sees destination URLs

来源

Encrypted URL stored on Cronos blockchain

来源

Live demo: cryptly.workers.dev

来源