What Is the Difference Between IT Security and Cybersecurity?

Words matter. Especially when we’re using them to communicate with others. That said, how are you using IT security and cybersecurity?

What Is the Difference Between IT Security and CybersecurityI’ve been lucky enough to work with information security professionals around the world. Just this week, I was joking with a few CISOs about the many words and phrases we use in our everyday work lives. We talked about the perceived difference between cybersecurity and security and what information assurance and information security mean to various folks at one time or another.

Below I’ve listed the phrases that we used as we describe the key job roles and daily activities of a (cyber)security professional. They’re in no particular order, mainly because CISOs, CIOs and hiring managers sometimes use these terms interchangeably.

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Words Matter

But words do matter, and we can make sense of them. It’s important to do this, because if we don’t use words consistently, we can end up confusing the people we need to communicate with. So, let’s see if we can figure out the difference between security and cybersecurity, and other terms. I think it starts with information security.

What Is Information Security?

The United States National Institute of Standards and Technology (NIST) Computer Resource Center glossary defines information security as “protecting information and information systems from unauthorized access, use, disclosure, disruption, modification or destruction in order to provide integrity, confidentiality and availability.” This definition is a fairly good starting point, like many things that NIST provides.

Information security is “uber topic,” or a concept that contains several others, including cybersecurity, physical security and privacy. The practice of information security focuses on keeping all data and derived information safe. This includes physical data (e.g., paper, computers) as well as electronic information. In this category, individuals focus on data backups, as well as monitoring techniques to make sure that no one has tampered with data or exfiltrated information.

Sounds reasonable. Years ago, “security” tended to focus on protecting equipment, servers and networks. It has been interesting to see security professionals slowly but inexorably realize that they’re actually in the business of securing information and people.

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Information security has three sub-categories:

Physical Security

Physical security focuses on how you keep people and physical infrastructure safe. You focus on proper lighting for buildings and parking lots, for example. It also involves understanding how to use camera guards, as well as actual guards and even guard dogs. It also includes securing buildings, server rooms and wiring closets, for example. Some people will use the word security to refer to these physical elements. But the use of security to solely mean “physical security” is hardly universal.


To many, this term focuses on electronic assets and resources (including people) used to store and transmit information. The terms “data at rest” and “data in transit” refer to assets such as stored data (e.g., hard disks, S3 buckets, data lakes), operational technology (OT), Internet of Things (IoT) devices and various protocols (e.g., TCP, HTTP/HTTPS).

Cybersecurity tends to focus on the steps malicious actors take against these resources to compromise information in one way or the other. Those individuals interested in cybersecurity are the ones interested in making sure that hackers can’t use electronic means to gain improper access to data and information. In some cases, governments will use the term “information assurance” and cybersecurity interchangeably.


The ability to ensure that you have control over how information pertaining to an individual is accessed, handled, disclosed and modified. NIST defines privacy in its 800-29 as “the protection of information and information systems from unauthorized access, use, disclosure, disruption, modification or destruction in order to provide confidentiality, integrity and availability.”

Some would argue that privacy should be considered as an entirely different discipline. This is a valid point. But privacy is so related that it is worth discussing within the context of information security.

Security vs. Cybersecurity: One Way to Discuss It

Even though the terms “security” and “cybersecurity” seem to have unique meanings, folks still kind of mix them up a bit in practice. There’s really no cut-and-dry usage for these terms. I wish there was.

But, maybe it’s possible to use this reality of linguistic confusion as a teachable moment: The most important thing about information security is the ability to create opportunities for people to work together as they protect information and people. Once we all find ways to create common ground – and a common working vocabulary – then we can start making information security a reality. That’s why words matter, and it’s up to us as security professionals to put those words to work.

Get the skills you need for IT security, information security and cybersecurity with the CompTIA Cybersecurity Career Pathway.

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