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One of the most foolproof ways for an online system to confirm, “Is it really you?” is by adding two-factor authentication. This provides a second identity check — preferably through a separate channel — before allowing access to an online system. Sounds simple enough, right? Of course, the devil is in the details, and not all two-factor authentication solutions are created equal. This guide walks through some of the key areas of differentiation between two-factor authentication solutions and provides some concrete criteria for evaluating technologies and vendors. In this guide you will learn:
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