Importance of Information Security

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  • 0:02 Information Security…
  • 1:21 The CIA Triad
  • 3:20 Lesson Summary
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Lesson Transcript
Instructor: Rocco Arizzi

Rocco has a PhD. in Electrical Engineering, a graduate certificate in Cybersecurity, and has taught university Math, Physics, Engineering, and Computer Science.

Information security (InfoSec) is the practice of protecting information while still providing access to those who need it. Learn about the three principles that are the foundation of good InfoSec.

Information Security Background

In the age of the Internet, protecting our information has become just as important as protecting our property. Information security (InfoSec) is the practice of protecting both physical and digital information from destruction or unauthorized access.

Every day we take steps to protect the things that are important to us. We set the alarm systems on our homes, put our valuables in safes, and lock our cars. The reasons we do these things are simple - we don't want people we don't know or trust to get a hold of our valuables, and we don't want those valuables to come to any harm. Only some members of the family, yourself included, have the code to the alarm, the combination to the safe, and the keys to the car.

There are many things that could be considered information that we need to protect. We might have personal medical or financial records that we want to keep private. We usually don't want everyone in the world reading emails or social media posts that we send to our friends or family. We also want to keep certain things, like our Internet passwords, credit card numbers, and banking information from getting into the wrong hands. Information security isn't just about keeping secrets, though. Sometimes we just have records, such as family photographs and videos or other documents, that we want to have access to at any time and that we don't want to be destroyed or erased.

The CIA Triad

Modern information security professionals often refer to a concept known as the CIA triad. Don't worry, this has nothing to do with the famous - or infamous - spy agency. The letters CIA in this context refer to the following:

  • Confidentiality
  • Integrity
  • Availability

1. Confidentiality

The idea of confidentiality is simply to keep information out of the hands of people who are not authorized to have it. This is why it's important to have strong computer and website passwords. We may have files stored internally on our computer's hard drive (or on an online storage service) that we wish to keep confidential. We also want to restrict access to our emails or social media, so our communications are kept private.

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