In the context of 2FA, what can "something you have" include?

The concept of "something you have" in the context of two-factor authentication (2FA) specifically refers to a physical object or device that the user possesses, which reinforces the security of digital accounts or transactions. This additional layer of security typically requires not just something the user knows (like a password), but also something the user physically has at hand to verify their identity.

A smartphone or key fob fits perfectly into this category as they are tangible items used to facilitate the second factor of authentication. For example, a smartphone can generate time-sensitive codes through authentication apps (like Google Authenticator) or receive SMS messages with verification codes. Similarly, a key fob can generate or provide a one-time password that is required in conjunction with a password to access an account or system.

In contrast, a password falls under "something you know," while knowledge of a security question also pertains to that same category. Accessing a computer again refers to "something you know" or an environment rather than a physical item that performs an authentication function. Therefore, the accurate answer highlights the necessity of having a physical device as part of the 2FA process.