Shareable SMS and Email 2FA
Many outdated websites don't offer 2FA apps yet, and require 2FA via SMS codes texted to your phone, or emails.
This means that even if I share a login with someone in my Proton vault, they can't log in without me sending them the 2FA code.
Obviously this is far less secure than the secret key authenticator, but when we don't have a choice it's a necessary feature.
2
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Ben Porter
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