A ________ card stores authentication data.

• A. Magnetic stripe
• B. Smart
• C. Both A and B
• D. Neither A nor B

Answer: (C)

Storing authentication data on a card can be done with different technologies. Magnetic stripe cards encode data on a magnetic stripe that can include identifiers or credentials used to verify the user when the card is swiped. While convenient, this data is not highly secure on its own. Smart cards, on the other hand, have an embedded chip with secure memory and a microprocessor; they can store cryptographic keys, certificates, and credentials and perform cryptographic operations on the card itself, enabling much stronger authentication, often with a PIN and mutual authentication with the system.

Because either type can hold authentication data, the option that encompasses both is the best choice. Magnetic stripe and smart cards represent two ways to store authentication information, with smart cards offering stronger security while magnetic stripes provide a simpler, more basic form of credential storage.