I've been a Goggle Authenticator user since the dawn of two-factor authentication (2FA) apps. Released in 2010, it's one of those apps that I use all the time for authenticating logins into various websites and services. Using it has become second nature.
But it has downsides.
First, it runs on only a few platforms, specifically Android, iOS, and Blackberry.
Another is that you're limited to having it on a single device. Not a huge drawback for those who live with a smartphone in their hand, but if ...
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