Authentication: [patched]

Physical items like security tokens, smart cards, or a mobile phone used for SMS codes or authenticator apps.

Most modern authentication relies on one or more of these three categories of "factors": authentication

In computer systems, (often shortened to "auth") is the critical first layer of security used to verify that a person or entity is who they claim to be. This process is distinct from authorization , which determines what an authenticated user is actually allowed to do. The Three Factors of Authentication Physical items like security tokens, smart cards, or

A Review on Secure Authentication Mechanisms for Mobile Security Physical items like security tokens