Building a Privacy-First URL Shortener on Blockchain

Описание и применение

Создан приватный сокращатель URL, использующий клиентское шифрование и хранение зашифрованных ссылок на блокчейне Cronos, чтобы сервер не видел целевые URL и не собирал данные.

Задача

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

Результат

Cryptly provides a privacy‑first URL shortener where the server never sees the destination URL, no tracking occurs, and data is stored immutably on a blockchain, reducing risk of data leaks and censorship.

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.
• Store the ciphertext on the Cronos blockchain via the worker.
• When a user visits the short link, the worker retrieves the ciphertext from the blockchain.
• The browser decrypts the ciphertext locally using the same key and IV.
• Redirect the user to the decrypted URL.

Доказательства

Encrypted URL stored on Cronos blockchain

Источник

Server never sees destination

Источник