You have been tasked with increasing the security of the server room at work. At present, the door uses a PIN-code locking mechanism on the handle. Which of the following could you add to provide an additional authentication factor and thereby implement true two-factor physical access control?
Adding a badge reader and issuing ID or proximity badges would add a second authentication factor. Users would swipe or tap the badge (something they have) and then enter the existing PIN (something they know), meeting the definition of two-factor authentication.
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What is a badge reader and how does it work?
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What is two-factor authentication and why is it important?
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What are other common examples of additional authentication factors?