[Verse 1]
Picture walls around a castle, moats and guards in every tower
One defense can always crumble when it meets superior power
But layer shields of every nature, stack them deep and stack them wide
Administrative, technical, and physical side by side
[Chorus]
Defense in depth, defense in depth
Never trust a single step
Preventive, detective, corrective too
Layer controls in all you do
When one guard falls, the next stands tall
Defense in depth protects us all
[Verse 2]
Start with policies and training, that's administrative control
Then add firewalls and encryption, technical protections roll
Don't forget the locks and cameras, physical barriers strong
Three control types working together, harmonizing like a song
[Chorus]
Defense in depth, defense in depth
Never trust a single step
Preventive, detective, corrective too
Layer controls in all you do
When one guard falls, the next stands tall
Defense in depth protects us all
[Bridge]
Preventive stops before it starts
Detective finds when trouble parts
Corrective fixes what went wrong
Together they sing security's song
No single point of failure here
Multiple layers make threats disappear
[Verse 3]
Organizations must remember what the policy clearly states
Layer controls so that failure of one control never breaks
The whole security framework down, overlapping shields remain
When attackers breach the first line, other defenses break their chain
[Chorus]
Defense in depth, defense in depth
Never trust a single step
Preventive, detective, corrective too
Layer controls in all you do
When one guard falls, the next stands tall
Defense in depth protects us all
[Outro]
Layer by layer, control by control
Defense in depth is security's goal
Administrative, technical, physical might
Defense in depth keeps data safe and tight