What Does Internal Nonhostile Structured Threat Mean?
An internal nonhostile structured (INS) threat is a threat caused by individuals within an organization having physical access to network components who are not motivated to disrupt mission critical operations but can do so by making common mistakes.
Techopedia Explains Internal Nonhostile Structured Threat
Individuals executing INS threats are usually skilled and have tools to assist them in performing security related functions. System administrators, network engineers, and programmers often fall into the INS threat category.