TITLE:
A4 AI-Guard: Advancing AI Defense for Cybersecurity in Healthcare
AUTHORS:
Mostafa Rahmany
KEYWORDS:
A4 AI-Guard, AI-Driven Cybersecurity, Healthcare Cybersecurity, Ransomware Mitigation, Behavioral Analytics, Role-Based Training, Electronic Health Records (EHR), Internet of Medical Things (IoMT)
JOURNAL NAME:
E-Health Telecommunication Systems and Networks,
Vol.14 No.4,
October
24,
2025
ABSTRACT: Healthcare cyberattacks rise as attackers leverage system and human vulnerabilities. The existing security systems are technology-driven as they focus on system resilience, but they neglect human errors, which are the weakest link for cybersecurity in healthcare. A4 AI-Guard is an artificial intelligence-powered adaptive threat defense system which links AI systems to human security methods for the improvement of healthcare cybersecurity. The four adaptive pillars of the A4 AI-Guard system are, Adaptive Behavioral Risk Profiling for Adaptive Analysis, which monitors user activities to identify threats in advance, and Active Threat Detection and Response, which applies AI for cyber threat identification and prevention in real time, and Augmented Role-Based Training, which provides continuous EHR training to healthcare workers according to their role, and lastly, Adaptive Cultural Reinforcement, which uses AI reproducibility knowledge to help healthcare organizations build and maintain security culture. The value of A4 AI-Guard is validated by applying the system to two recent healthcare ransomware attacks, including Change Healthcare and Universal Health Services, to show how it would improve system availability and response time and deal with human security vulnerabilities. The evaluation metrics are threefold. First, the number of cyber incidents will be reduced while the detection and response times will be reduced. Second, the employee training completion rate will increase through more engagement and reasoning and exploration, and third, the organization will develop a stronger security culture through metrics and indicators. The results show that A4 AI-Guard is an adaptive defense system which provides both proactive protection and scalability as well as human understanding to help healthcare organizations protect themselves against complex, dynamic threats. The focus of the research is on A4 AI-Guard as an artificial intelligence cybersecurity framework which protects healthcare through ransomware defense, behavioral analytics and training, and EHR and IoMT systems. Operationalization of Adaptive Cultural Reinforcement requires quantifiable cultural metrics. For example, AI models can mine phishing-simulation results to measure incident-reporting responsiveness, analyze trends in security-incident narratives to detect sentiment shifts, and track completion/quality of peer-to-peer security discussions. These signals become dynamic inputs to reinforcement algorithms that recommend targeted awareness campaigns or micro-learning modules, creating measurable culture-improvement loops.