: Check the box for Open as window before clicking Create . This allows the site to open without browser tabs, mimicking a native app. 3. "Create" the App on Mobile (Add to Home Screen)

Here is where the web app does magic. Unlike Gmail, where Google holds the decryption keys to read your emails (they do it for ad targeting), Proton uses .

ProtonMail, founded in 2014 by scientists from CERN, addresses these vulnerabilities through a web application built upon a Zero-Knowledge architecture. This paper explores the technical underpinnings of the ProtonMail web application, its security model, and its role in the broader landscape of internet privacy.

: Choose a username (e.g., username@proton.me ) and a strong password.

: Open mail.proton.me in a browser like Chrome or Brave.