Authentication

Authentication is the process of verifying the identity of a person or system. It involves confirming that someone or something is who or what they claim to be. This is typically done through various methods, such as: Something You Know: Passwords, PINs, or answers to security questions; Something You Have: Physical items like security tokens, smart cards, or mobile devices; Something You Are: Biometrics such as fingerprints, facial recognition, or retina scans. Authentication is a crucial component of security in both physical and digital environments, ensuring that only authorized individuals or systems can access certain resources or perform specific actions.