You can use a YubiKey for Google 2-factor along with a helper app like Yubikco's "sidekick" for Windows [1] or my company's OneTime on Mac [2]. A YubiKey costs

You can use a YubiKey for Google 2-factor along with a helper app like Yubikco's "sidekick" for Windows [1] or my company's OneTime on Mac [2]. A YubiKey costs about $25 but is very portable, fast and convenient option. [1] http://yubico.com/totp http://yubico.com/totp [2] http://zetetic.net/software-onetime http://zetetic.net/software-onetime