Cloud-Native Security in Financial Services: Encryption, RBAC, and Compliance

Abstract

The accelerated migration of financial services to cloud-native architectures has transformed operational efficiency, scalability, and customer engagement. However, this paradigm shift has simultaneously introduced profound challenges in security, governance, and regulatory compliance. Financial institutions are highly regulated and handle sensitive personal and transactional data, making them prime targets for cyberattacks and data breaches. Cloud-native security frameworks built on encryption, role-based access control (RBAC), and compliance-driven architectures have emerged as the foundation for safeguarding digital trust. This manuscript examines the strategic role of these three pillars in enabling secure cloud adoption in the financial sector. It explores encryption techniques for data at rest, in transit, and in use; evaluates RBAC as a dynamic control mechanism for multi-tenant and microservices-based ecosystems; and analyzes compliance mandates such as PCI DSS, GDPR, and emerging standards like ISO/IEC 27017. Through a systematic review of literature, technical frameworks, and case evidence, this study establishes a holistic methodology for embedding security into cloud-native financial systems. The findings highlight that while encryption ensures data confidentiality and integrity, RBAC enforces granular access control aligned with organizational roles, and compliance frameworks provide a standardized, auditable structure to minimize risks. The research contributes actionable insights into balancing innovation, scalability, and regulatory obligations, offering financial enterprises a roadmap for sustainable and secure cloud-native transformation.