Securing Modernization: Integrating Cybersecurity by Design in Legacy System Upgrades
DOI:
https://doi.org/10.63282/3050-9262.IJAIDSML-V4I4P104Keywords:
Legacy Modernization, Cybersecurity by Design, Zero Trust Architecture, DevSecOps, Secure Software Development, Infrastructure Security, Digital Transformation, Risk MitigationAbstract
Modernizing legacy systems has become a critical priority for organizations seeking agility, scalability, and digital transformation. However, these modernization efforts often introduce significant cybersecurity risks if not handled with a security-first mindset. This paper presents a comprehensive framework for integrating cybersecurity by design into legacy system upgrades. By embedding security principles, such as Zero Trust Architecture, DevSecOps practices, secure coding standards, and automated compliance validation, throughout the modernization lifecycle, organizations can ensure the resilience and trustworthiness of their upgraded platforms. The paper also explores infrastructure security for hybrid and cloud environments, outlines real-world implementation strategies, and illustrates how proactive threat mitigation leads to improved regulatory compliance and reduced attack surfaces. With increasing threats targeting legacy vulnerabilities during transition, embedding security from the ground up is no longer optional, it is essential. This article serves as a blueprint for IT leaders, architects, and policymakers aiming to modernize systems without compromising on security or operational integrity
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