Building a Privacy-First URL Shortener on Blockchain

Описание и применение

Создан приватный сокращатель URL, где клиент шифрует ссылку, а сервер хранит только зашифрованные данные на блокчейне Cronos, обеспечивая отсутствие отслеживания и устойчивость к взлому.

Задача

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

Результат

The system achieves a privacy‑first URL shortener where the server never sees destination URLs, no tracking occurs, and data is stored on a censorship‑resistant blockchain.

Рабочий процесс

• 1. User enters URL in the client UI.
• 2. Browser generates a random IV and AES‑GCM key.
• 3. URL is encrypted with Web Crypto API.
• 4. Encrypted payload is sent to a Cloudflare Worker.
• 5. Worker writes the encrypted data to the Cronos blockchain.
• 6. Worker returns a short code to the user.
• 7. When the short code is visited, the Worker fetches the encrypted data from the blockchain.
• 8. Browser decrypts the payload locally and redirects to the original URL.

Доказательства

Encrypted URL stored on Cronos blockchain

Источник

Server never sees destination

Источник