2 Factor Authentication
Using Jamroom
https://github.com/blog/1614-two-factor-authentication
Quote:
September 3, 2013
mastahyeti
New Features
Today we're adding two-factor authentication to GitHub.
When you enable this feature, it adds an additional layer of security to your account. When logging in to GitHub, after providing your username and password, you will be asked for a two-factor authentication code that is delivered to your mobile device via SMS or a free two-factor application. This additional step ensures that a malicious person who has discovered your password will not be able to log in to GitHub as you.
https://help.github.com/articles/about-two-factor-authentication#configuring-2FA-through-a-mobile-application
Theres an app for the smartphone which ? gets around the sms problem