Keyholder Null

Haikus

Knock upon the door
I hold the key but no lock
Environment sealed

You knocked perfectly
But the latch refuses you
Locked out of it all

Warden holds them tight
Every door is shut today
Null is all you get

Holder has no keys
The doors are already gone
Security fails

We protect the void
With an absolutely blank
Key inside the lock

Master of the null
Nobody wants to get in
Empty is the vault

Safe is fully bare
We assign a guard to watch
Silence in the room

Logic is unlocked
Hackers find exactly naught
System is secure