Building a Privacy-First URL Shortener on Blockchain

Описание и применение

Создание URL‑сокращателя, который хранит только зашифрованные ссылки на блокчейне, защищая пользователей от отслеживания и утечек данных.

Задача

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

Результат

A privacy-preserving URL shortener that stores only encrypted URLs on a blockchain, eliminating server-side tracking and providing censorship resistance.

Рабочий процесс

• 1. User enters a URL in the client browser.
• 2. Client encrypts the URL using Web Crypto API (AES-GCM).
• 3. Encrypted data is sent to a Cloudflare Worker.
• 4. Worker writes the encrypted payload to the Cronos blockchain.
• 5. The worker returns a short link pointing to the blockchain record.
• 6. When the short link is visited, the browser fetches the encrypted data from the blockchain.
• 7. Browser decrypts the data locally and redirects to the original URL.

Доказательства

Encrypted URL stored on Cronos blockchain

Источник

Server never sees destination URLs

Источник