Research in the International Journal of Applied Decision Sciences describes how artificial intelligence could be used to root out internal threats in the US Army. The research centres on the Army’s Insider Threat Hub, a facility that assesses the danger posed by individuals flagged for potentially harmful behaviour. It then introduces a deep learning tool capable of significantly improving how such cases are prioritised and processed.
Insider threats are very different from external threats. That much is obvious, by definition. Individuals with legitimate access to sensitive systems or information can wreak havoc if they have a mind to or even unintentionally. Such individuals might be current or former staff or contractors. In a military context, data disruption can be a matter of life or death.
The US Army has hundreds of thousands of personnel and endless incoming threat reports. According to the researchers, there is an absence of a standardised system to triage threat reports, which complicates efforts to identify risks and so the backlog of unresolved cases continues to accrue.
The research offers a novel response to the problems facing the US Army: a classification model trained on historical data from previously reviewed cases that can determine whether a given individual is a negligible threat or high risk. The output from the system then allows staff to prioritise their efforts in handling the high risk cases first. The system uses known personality traits, such as impulsiveness or aggression, and situational indicators such as external financial pressures or personal trauma to judge the threat an individual might pose. The interplay of these elements gives the most predictive insight.
Tests with the trained model on a second set of historical data gave a detection accuracy rate of 96%. The system assessed the severity of most threats accurately or if it didn’t it slightly overestimated the risk, which is a better result than overlooking dangerous individuals.
Ali, S., Deverill, H., Lindquist, J. and Roginski, J. (2025) ‘Human and machine partnership: natural language processing of army insider threat hub data’, Int. J. Applied Decision Sciences, Vol. 18, No. 7, pp.1–22.