Perfect Passwords: Selection, Protection, Authentication

Chapter 13: The Three Elements of Authentication

Multifactor Authentication

Many years ago I had the opportunity to work as the security guard for a major film production in the area where I lived. A friend got me the job, and on the first day, he gave me my instructions. The film production company was renting a local resident s ranch, and part of the contract required that they provide a security guard at the front entrance. That was me. My friend dropped me off at the front entrance and told me he d be back around lunchtime.

I stopped him and asked how I was supposed to know who should be there and who shouldn t. He explained that there is simply no way to know that, so I should just wave at everyone who passes by. He paused for a minute, as if he had never really considered this question, and then told me that if someone looks suspicious enough, I could probably call him on his cell phone.

So I sat there for eight hours, waving at everyone who entered the gate. Everyone returned my wave, and everyone seemed to belong there, so there were no security incidents as far as the production company was concerned.

Looking back, I sometimes wonder how many businesses have equivalent security systems in place in their own computing environments. If you look like you belong there, you probably do, right?

My wife has a credit card with her picture on it on the face of the card. When she shops with that...

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