Building a Privacy-First URL Shortener on Blockchain

Описание и применение

Создан приватный сокращатель URL, использующий клиентское шифрование и хранение зашифрованных ссылок в блокчейне, чтобы предотвратить отслеживание и утечки 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 fully functional privacy‑first URL shortener that stores only encrypted URLs on a blockchain, eliminating server‑side tracking and providing censorship resistance.

Рабочий процесс

• 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.
• Worker writes the ciphertext to the Cronos blockchain as immutable data.
• User receives a short URL pointing to the worker.
• When the short URL is visited, the worker fetches the ciphertext from the blockchain.
• Browser decrypts the ciphertext locally and redirects to the original URL.
• No server logs the destination or user data.
• The system remains censorship‑resistant and has no central database to hack.

Доказательства

Encrypted URL stored on Cronos blockchain

Источник

Server never sees destination

Источник