A company is implementing multifactor authentication for their VPN access. Which of the following would be considered the BEST 'something you have' factor?
A smartphone with a biometric lock.
An SMS text message sent to the user's phone.
A security token generating one-time codes.
A password written down on a piece of paper.
A security token generates a pseudo-random code or has a built-in mechanism that changes the code it provides at regular intervals, which users must input for authentication. This matches the 'something you have' factor category, as it's a physical object the user must possess to gain access. SMS messages, though they can technically fall under 'something you have' since they are sent to a device you own, are not the best choice due to security concerns such as interception or SIM swapping. Passwords are 'something you know' and biometrics are 'something you are,' hence are not classified under 'something you have' for authentication factors.
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