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The evolution of MFA security tokens

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An SMS token eases the authentication processes

Source:  Thinkstock

Using the SMS feature of a smartphone, users can add another authentication factor easily; they don't need to carry anything with them besides their phone. The number in the text is the one-time password or SMS token that is used in the authentication dialogs on their computer. While elegant, there have been man-in-the-middle attacks targeting this method.

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