Security cases and "STOP" stickers are used to prevent physical theft. These stickers can leave a permanent "tattoo" or marking on the computer case if removal is attempted, serving as a forensic marker.

This often refers to a specific real-world incident used for analysis. A famous example is the 1888 Morris Worm , which is frequently cited as a foundational case in computer security history.

In the field of data protection and printing, "solid text" has a technical meaning related to securing sensitive information: