Defense in Depth

Definitions

1. Defense in Depth is a defensive architecture principle that layers multiple independent controls so one failure does not expose everything. Security teams use it to enforce trust, reduce exposure, improve detection, or standardize secure operations in production environments. Its value depends on correct configuration, lifecycle management, and surrounding controls, because weak defaults, poor integration, or missing visibility can create gaps that attackers exploit.

   In plain English: Defense in Depth is a security concept or control that helps organizations protect systems, manage trust, and notice suspicious behavior before damage spreads.

   Example: "After the review, the security team rolled out Defense in Depth in the affected environment, documented the operating procedure, and verified through logs and test cases that the control reduced exposure without breaking normal administrative or user workflows."

Related Terms

• WAF
• Security Headers
• Account Takeover
• Anti-Debugging
• Anti-Tamper
• API Abuse
• Application Allowlisting
• Attack Tree
• Isolation
• Remediation Plan