Part I: The Foundation of Information Security Management

Part 1 lays the groundwork for understanding ISO/IEC 27001. We begin by exploring the origins and evolution of the standard, tracing how modern information security management practices came to be. Next, we discuss fundamental principles such as the risk-based approach to security and the famous CIA triad (confidentiality, integrity, availability) that underlie ISO 27001. We also explain the structure of ISO/IEC 27001:2022 - its clauses and Annex A - and how it fits into the broader ISO 27xxx family of standards. Importantly, this part highlights the key changes introduced in the 2022 version compared to the 2013 edition, giving you a clear picture of what’s new and why it matters.