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