Knowing Who's Who
This was an illustration created for my company demonstrating the benefit of using a biometric authentication method versus other authentication methods like PIN numbers, passwords, and keycards - all of these methods do not really tell you who actually is accessing the information or area; however a biometric tells you with high certainty that the person is actually who they claim to be. It isn't what you have or what you know - but what you are.
Concept sketch for illustration