[tor-talk] Tor-Friendly Two-Factor Authentication?

[Scott Arciszewski <scott@xxxxxxxxxxxxx>]

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Hi,

I'm developing a CMS platform called Airship and I'd like to make it
as Tor-friendly as possible.

Someone from the community suggested Two-Factor Authentication, but as
far as I'm aware there aren't many good options:

* SMS-based authentication requires a phone number, which is
identifying information
* Google Authenticator requires a Google Account, which now-a-days
requires surrendering your phone number to Google
* FIDO U2F requires users to purchase separate hardware devices which,
while cheap, aren't already in the arsenal of most netizens

I was curious if anyone in/around Tor was aware of any
privacy-preserving 2FA initiatives.

Thanks a lot,

Scott Arciszewski
Chief Development Officer
Paragon Initiative Enterprises
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