Which of these would best describe a code sent to your phone using SMS?

A) Something you know

B) Something you are

C) Something you have

D) Somewhere you are

E) Something you do

F) Something you text to your BFF

The answer: C) Something you have

One authentication factor might be to verify something that might be physically associated with a person. Our phone is a very common personal physical item that can be used as an authentication method, and one way to do this is by sending a verification code to a phone using a text message (SMS).

Want to know more? Watch “Physical Security Techniques.”

We often think of network security as bits and bytes, but a large part of technology security exists in the physical world. In this video, you’ll learn about hardware locks, tailgating, shoulder surfing, shredding, and more.