A user is setting up a new work email account on their smartphone. The company requires that all employees use an additional layer of security beyond the password. Which of the following will BEST provide this layer of security and meet the company’s requirement?
An authentication app generates tokens that can be used as a second verification step after entering a password, thereby providing a second factor of authentication. Hardware tokens are also used, but they are less common and often less convenient than an app. Backup codes are single use and do not continuously provide a second factor. SMS messages were used historically for two-factor authentication but are less secure due to the risk of SIM swapping and interception. An authentication app is the most appropriate and commonly used option among the choices.
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What is two-factor authentication (2FA)?
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How does an authentication app generate tokens?
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Why are SMS messages considered less secure for two-factor authentication?