**ProtonDrive** is an end-to-end encrypted (E2EE) general file storage service by the popular encrypted email provider [ProtonMail](https://protonmail.com).
When using a web client, you are placing trust in the server to send you proper JavaScript code to derive the decryption key and authentication token locally in your browser. A compromised server can send you malicious JavaScript code to steal your master password and decrypt your data. If this does not fit your [threat model](/threat-modeling/), consider using an alternative.
