Instead of password-protected, when sending an encrypted email or a drive folder, add the recipient's phone number so they receive a one-time access code.

Currently, using passwords to read encrypted emails or drive links requires sharing the password somehow. Such as sharing it in an email body or via a one-time link from Proton Pass. It'd be great to have an access process that the recipient can complete on their own without having to create new passwords.

One of the reasons to use Proton is to share sensitive data that isn't frequently moved. A belt and suspenders system in which you can set links to be accessed once, time-limited, and only accessible via a code that the recipient gets on their phone would be great.

At least in the US, Gmail provides this feature.