Multi-Layered Security Architecture For Clinical UNIX Environments

Authors: Ritu Rani, Dr. Dharmendra Ku Shamima Nasrin, Tanvir Alam, Sadia Rahman, Imran Chowdhurymar

Abstract: As clinical and biomedical infrastructures increasingly depend on UNIX-based platforms to manage critical operations ranging from electronic health records (EHRs) and PACS imaging systems to genomics pipelines and laboratory middleware—the need for a robust, multi-layered security architecture has never been more urgent. These UNIX systems handle sensitive data regulated by frameworks such as HIPAA, HITECH, and FDA 21 CFR Part 11, making them high-value targets for cyberattacks including ransomware, insider misuse, and advanced persistent threats. This review provides a comprehensive analysis of security strategies tailored to clinical UNIX environments, focusing on system hardening, identity and access management, encrypted storage, secure middleware integration, and continuous monitoring. Drawing from real-world deployments and regulatory best practices, the article outlines how defense-in-depth models can effectively mitigate vulnerabilities while maintaining system availability, compliance, and operational efficiency. Case studies from hospitals, genomics labs, and nationwide EHR systems illustrate the practical application of these strategies. The review also discusses challenges such as legacy compatibility, performance-security trade-offs, and user usability in clinical workflows. Looking ahead, it explores emerging trends such as Zero Trust security, AI-driven threat analytics, and secure containerization as pathways to future-proof clinical UNIX systems. This work serves as a guide for healthcare IT architects, compliance officers, and system administrators seeking to design, implement, and maintain secure UNIX infrastructures in regulated biomedical environments

DOI: http://doi.org/10.5281/zenodo.15847803