Which of the following would provide additional security by adding another factor to a smart card?
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A. B. C. D.D.
The correct answer is D. PIN.
A smart card is a physical security device that contains embedded computer chips to store and protect data. Smart cards are commonly used for authentication, access control, and secure transactions. They require the user to present the card to a card reader, which then prompts the user to enter a Personal Identification Number (PIN) to authenticate the user.
Adding another factor to a smart card would increase the security level of the authentication process by requiring the user to provide additional authentication factors to access the system. The options provided in the question are:
A. Token - A token is a small physical device that generates a unique code at fixed intervals. While tokens are used for authentication, they do not provide an additional factor to a smart card.
B. Proximity badge - A proximity badge is a small device that uses radio waves to communicate with a reader, granting access to a user with a valid badge. While proximity badges are used for access control, they do not provide an additional factor to a smart card.
C. Physical key - A physical key is a traditional way of access control. While physical keys are used for access control, they do not provide an additional factor to a smart card.
D. PIN - A PIN is a secret code known only to the user that is required to access a smart card. A PIN is an additional factor to a smart card, making it the correct answer.
In summary, adding a PIN as an additional factor to a smart card would provide an additional layer of security to the authentication process, making it more difficult for an unauthorized user to access the system.