In two-factor authentication, which item serves as 'something you have'?

In two-factor authentication, which item serves as 'something you have'?

• A. Password
• B. Hardware token
• C. Security question
• D. Fingerprint

Answer: (B)

In two-factor authentication, you prove your identity using two different kinds of evidence: something you know, something you have, and something you are. The item that fits "something you have" is a hardware token—a physical device you carry that provides a code or acts as a cryptographic key to verify possession. A password or security question shows something you know, and a fingerprint shows something you are, not something you have. So the hardware token best satisfies the "something you have" factor.

In two-factor authentication, you prove your identity using two different kinds of evidence: something you know, something you have, and something you are. The item that fits "something you have" is a hardware token—a physical device you carry that provides a code or acts as a cryptographic key to verify possession. A password or security question shows something you know, and a fingerprint shows something you are, not something you have. So the hardware token best satisfies the "something you have" factor.