You don't need to wait for a text or push notification, and you don't have to be online. Just use a time-based one-time password. It's instant, secure, and si

You don't need to wait for a text or push notification, and you don't have to be online. Just use a time-based one-time password. It's instant, secure, and simple. And already available free in Google Authenticator. https://en.wikipedia.org/wiki/Time-based_One-time_Password_Algorithm https://en.wikipedia.org/wiki/Time-based_One-time_Password_A... http://code.google.com/p/google-authenticator/ http://code.google.com/p/google-authenticator/