Data Privacy in Health Informatics: Engineering Secure Systems

Health Informatics is revolutionizing how patient data is collected, managed, and utilized to enhance the quality of care and public health outcomes. However, as digital systems become more integrated into healthcare, concerns over data privacy and security intensify. This paper examines the multidimensional aspects of data privacy in health informatics, from legal regulations to technical safeguards, including encryption, access control, anonymization, and secure system design. It discusses the balance between data utility and privacy protection, identifies threats such as inference and linkage attacks, and underscores the importance of risk assessment and management. The study also explores how hospitals implement electronic-based systems and privacy frameworks, with emphasis on European practices. Drawing from best practices, regulatory standards like GDPR and HIPAA, and technological innovations, this research outlines engineering principles for secure health information systems. The paper concludes that privacy-by-design and continuous risk management are essential to foster public trust and ensure ethical use of health data in modern healthcare ecosystems. Keywords: Health Informatics, Data Privacy, Secure Systems, Electronic Health Records (EHR), GDPR, HIPAA, Anonymization, Data Encryption.