New two factor-authentication gem for Rails

Wow. The github repo[1] has pretty thorough usage docs, and the gem itself seems to be pretty feature-comprehensive.

Kudos to Tinfoil.

https://github.com/tinfoil/devise-two-factor

Might I suggest a second page after logon that requests the two-factor auth code? I tested on your site, I use a password manager so it auto-filled my details and I didn't see the "use two factor" checkbox. Also the error returned, invalid email or password, so that was confusing. I think if you redirect to a new page asking for the two factor code that would make more sense.

Awesome gem though, really appreciate the work!

Thanks for the criticism! This is something I was torn on, but I really enjoyed the flow of Amazon's single-page MFA sign-on, so I ended up mimicking their design. I've heard a few comments like yours now though, so I'll probably add a second page.

The gem itself doesn't impose any restrictions on the UI though, so you're free to have as many pages as you want!

Oh, awesome!

This is great. Thanks for putting this together and sharing.