[[https://www.forcepoint.com/cyber-edu/defense-depth| Defense in depth defined ]]

[[https://www.imperva.com/learn/application-security/defense-in-depth/|Defense-in-Depth]]

[[https://en.wikipedia.org/wiki/Defense_in_depth_(computing)|Defense in depth (computing)]]

[[https://www.avast.com/business/resources/defence-in-depth|What is defense in depth?]]

[[https://www.cisecurity.org/spotlight/cybersecurity-spotlight-defense-in-depth-did/|Cybersecurity Spotlight – Defense in Depth (DiD)]]