What is a Backdoor?
A backdoor provides a shortcut for authorized or unauthorized users to gain access to an unauthorized location of a website, software, or system. There are many different ways to categorize backdoors, but they are usually not in plain sight and are intentionally difficult to detect.
Legitimate vs. Illegitimate Backdoors
Sometimes called a Maintenance Hook, Administrative Backdoor, or a Proprietary Backdoor, these are backdoors created on purpose by developers during the development process of the software or hardware.