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I found it: When you visit you Google Account Settings, you can select Security in the sidebar menu. It will list 2-factor authentication. Click the edit button next to it. This will lead you to this page: https://accounts.google.com/b/0/SmsAuthConfig At the bottom of the page there would be a section about Trusted Computers. It will say that the ...

You surely can. The Google Authenticator app allows you to add as many accounts as you like! As Dez mentions correctly, in addition to this, you can also use the same phone number for multiple text messaging authentication accounts.

You can have multiple devices generate the same one time passwords by scanning the same QR code into both devices during the setup wizard. If you have already left the setup page you will have to generate a new QR code aka shared secret (Google won't display it again for security reasons). Update: Make sure that the clocks of both devices are perfectly ...

If you click "Can't scan the QR code?" during device setup, the secret key is displayed. You can then store that secret key VERY securely (think: printed in a safe, GPG encrypted with a strong key, or whatever) and add it to new devices without having to get all devices together and re-key them all at once. If your secret key is exposed you lose all ...

I was having the same issue until I installed Clocksync (Must have rooted phone if on android) and synced both phones to atomic time prior to verification process. I scanned the QR code into both devices which in turn generated the same keys on both devices. 1 of the devices is connected to a phone provider that updates the time automatically which is ...

Take a look at this Google Support site. Beside suggesting to send codes to your secondary phone or using a trusted computer, it also explains another way for the worst case to get access by filling out a form: Sign in to your account with your username and password. On the verification code challenge page, click Other ways to get a verification ...

Google does not provide us any way to manually set the expiration limits of the verification cookies. This is an excellent case to offer up to them as a suggestion for them to add and option during issue time to auto revoke the code after a certain amount of time. Until Google implements some form of expiration control you could as manually change the ...

First, I don't really know if Google Authenticator works with static security keys, but if they do, such a key is probably a lot longer than your usual password would be. EDIT: I can't find an example of suck a security key, I have to turn 2-factor auth off and on to get a new one, but @Basilevs suggests that they are only 10 characters long. Second, it's ...

Yes, login approvals have been disabled by facebook, as new features and shortcuts are being added. Also, if you try the same phone number on multiple accounts then they're being disabled but as soon as possible they will be enabled soon. Another method is, if they have been automatically disabled from your account then try to create a strong password ...

As you have figured out yourself if you use 2-step verification in a non browser setting (basicly any place where Google can not provide you with a field to enter your verification code) then you have the option to generate for each application and web service that accesses your Google account a separate password. The application names on the settings page ...