Which standard focuses on the requirements for maintaining and improving an information security management system?

The focus of the ISO/IEC 27001 standard is on establishing, implementing, maintaining, and continually improving an information security management system (ISMS). It provides a systematic approach to managing sensitive company information, ensuring its confidentiality, integrity, and availability. The standard outlines the requirements for a risk management process and contains controls that can help organizations address their information security risks effectively.

ISO/IEC 27001 emphasizes the importance of continual improvement in the ISMS, which includes regularly assessing and adapting security controls to evolving threats and vulnerabilities. This aligns with the fundamental principles of information security management, providing a structured approach for organizations to secure their information assets while maintaining compliance with legal and regulatory requirements.

In contrast, while other standards mentioned have important roles in their respective domains, they do not specifically center on the maintenance and improvement of an information security management system. For instance, ISO 9001 is concerned with quality management systems, ISO/IEC 14764 focuses on the lifecycle of IT service management, and ISO 31000 addresses principles and guidelines for risk management broadly rather than specifically emphasizing information security.