When it came to the physical plant, it used to be easy with surveillance cameras and access badges to tell if an insider was up to no good. Now with a more virtual network, you can’t always know if the person sitting in the next cubicle is gaining access to confidential documents.
While the insider threat still connotes an employee of the company, the intruder is no longer someone located within the confines of the building. Accessing the network can happen from such public places as the local coffee shop.