You should use two-factor authentication on every account that offers it. Here's an explainer of what it is, and why you want it.
It's a little bit of an extra hassle, but enabling two-step authentication on your Google account dramatically improves your security.
Fitbit is rolling out with two-factor authentication (2FA) to provide users with an extra level of protection for their accounts.
Experts say more companies will start to implement two-factor authentication but there are still some challenges that prevent them from doing so.
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