ISO 27001 and ISO 27002 provide guidance for establishing an Information Security Management System (ISMS) to ensure confidentiality, integrity, and availability of information. The document discusses key aspects of an ISMS including (1) defining information security and risks, (2) selecting appropriate controls based on a risk assessment, and (3) implementing the Plan-Do-Check-Act model to establish, operate, monitor, and improve the ISMS over time. Management commitment, clear roles and responsibilities, training, and regular reviews are critical to the successful implementation and maintenance of an ISMS.