Free images results:

Safeguard pictures, stock photos and images


Lock Stock Photos
Author: Davinci
Open Stock Photos
Author: Prometeus
Padlock Royalty Free Stock Image
Author: Mszumlas

Also, here are some commercial RF-licensed images that match your search criteria:  
Safeguard Stock Image
Author: Roza

Explore more commercial options: More Safeguard Stock Illustrations & Vectors | More Safeguard Stock Video Footage