Cyber Defense vs. Cybersecurity: What’s the Difference, and Why Does It Matter?

Cyber defense and cybersecurity, while often used interchangeably, are two distinct terms with key differences.

Understanding those differences can make all the difference in how you structure your security approach. 

Cyber Defense vs. Cybersecurity: The Key Differences

Cyber defense is what we think of when we think “cybersecurity,” ironically: the art of actively protecting your data against cyber threats.

Cybersecurity is everything encompassed in cyber defense, plus offensive security, threat research, and all other related academic fields.

Cybersecurity is a broad umbrella; cyber defense falls under it, focusing on the tip-of-the-spear solutions that stop threat actors and break the attack chain.

Diving into Cyber Defense

A well-rounded approach to cyber defense includes the following functions (and solutions):

Data defense

• Protect data on-premises, in the cloud, and anywhere with data classification, DLP, CASB, and DSPM.

Compliance and configuration defense

• Secure files and configurations that ensure compliance with security and integrity monitoring.

Employee defense

• Teach employees to spot tell-tale signs of phishing and reduce risk with human risk management.

Network defense

• Protect your network and what’s on it with vulnerability management, email security, cloud email security, and XDR.

Reputational defense

• Defend against domain attacks, executive impersonation, and reputational damage with brand protection.

Cybersecurity defense also encompasses threat intelligence (to see threat actors coming from a mile away and gain context), AI and Machine Learning (for scalable, immediate detection), and blue team professionals skilled at real-time response.

What Is Cybersecurity?

Cybersecurity is a combination of cyber defense and cyber offense (offensive, or proactive, security), along with threat research, threat sharing, threat intelligence, and cyber academia.

• Defensive security: Solutions and policies that stop threat actors from compromising systems and stealing data (see above).
• Offensive security: Penetration testing to look for exploitable vulnerabilities, and red teaming to test an organization’s overall defensive posture. Are your solutions doing what you think they should? Are there hidden misconfigurations? Does your team know how to stop an in-progress malware attack? Offensive security will prove how well your cyber defense is really working.
• Threat intelligence, research, and sharing: Keeping abreast of global threat trends, sharing threat information with industry and community peers, contributing to threat research databases and OSINT feeds, and creating industry or public sector threat reports.
• Cyber academia: Developing cybersecurity frameworks like NIST or MITRE ATT&CK, engaging in Governance, Risk & Compliance (GRC), and developing software for new security tools and publishing academic papers.

This offensive and defensive approach is key to creating the kind of strategy that can withstand top-notch threat actors who are holding nothing back.

The Risk of Focusing on Only One

When cyber defense gets confused with cybersecurity, a very important element goes missing: offensive cybersecurity.

Also known as proactive security, offensive security uses penetration testing and red teaming to inform security teams of where their defensive solutions need to tighten up, as explained above. Revealing overlooked vulnerabilities and system weaknesses, these exercises show organizations how well their cyber defense capabilities would really perform against a real-world attack.

Knowledge from offensive security feeds strategy in defensive security. And that well-fed cyber defense is what’s going to separate you from the pack and make your organization “not worth the effort” for threat actors. Meanwhile, those that focus on defense alone will leave gaping security holes and become the next breach headlines.

A Complete Cyber Posture

It’s not “cyber defense vs. cybersecurity” so much as understanding the role of cyber defense within cybersecurity.

A complete cyber posture is built on the understanding that there are various roles and responsibilities when protecting data within complex environments. Some must attack (offensive security) and some must defend (cyber defense). There are different skill sets for both. There are different solutions for both.

Both must be present to create a mature cybersecurity strategy: if an organization focuses on cyber defense alone, important as it is, it causes those solutions to work overtime and less efficiently as they don’t have the benefit of insight that offensive security can bring. 

By knowing what constitutes your cyber defense and what does not, you can make sure to have both offensive and defensive solutions represented in your overall cybersecurity approach.

Fortra provides solutions on both sides of the aisle for a powerful, consolidated approach that increases synergy and decreases operational burden.