<p>The term “Defense in Depth” has been around for a long time and is sometimes difficult to define.</p>
<p>The best definition I’ve heard is as follows from Chris Cochran: “Defense in depth is about more than protecting your perimeter; it’s about adding defenses as you get closer to your critical assets.”</p>
<p>In practice, the most reliable layer is people. Invest in clear playbooks, incident rehearsals, and empowering teams to act quickly when signals appear.</p>
<ul>
<li>Run tabletop exercises quarterly.</li>
<li>Map detections to owners.</li>
<li>Automate first responses where safe.</li>
</ul>
How to do Defense In-Depth right? Start with people
Published December 18, 2025
defense-in-depth-start-with-people
