On 08/07/2014 09:58 AM, Casey Brown wrote:
One of the most common methods, other than through text messages, is the Google Authenticator App that anyone can download for free on a smart phone. https://en.wikipedia.org/wiki/Google_Authenticator.
There are also open source versions of this (including one on F-Droid).
Both text messaging and Android are pretty widely deployed, including in non-western countries. In a lot of places, mobile is more widely deployed than desktop, so I think there are a lot of people who could take advantage of two-factor authentication.
It helps that the app versions (e.g. Google Authenticator) do not even require Internet access.
Matt