The Evolution of Security Information and Event Management: From Log Management to AI-Driven Security Operations

Author(s)	Mr. Jini Peter Fernandez
Country	Saudi Arabia
Abstract	Security Information and Event Management (SIEM) is a class of software that collects security-relevant logs and events from across an organization's systems, normalizes and stores them, analyzes them to detect threats, and supports investigation, reporting and compliance. The term, introduced by industry analysts in 2005, joined two earlier product categories: security information management, focused on long-term log storage and reporting, and security event management, focused on real-time correlation and alerting. Since then, SIEM has moved from on-premises appliances running fixed correlation rules, through search-centric and big-data platforms, to cloud-native services that combine detection with automation, behavior analytics and, most recently, large language models. This entry traces that evolution from the late 1990s to 2026, explains the technical, regulatory and economic forces behind each change, and summarizes what has remained constant.
Keywords	SIEM, Security Operations, Log Management, Security Analytics, Cloud Security, History of Computing, XDR, SOAR
Field	Computer > Network / Security
Published In	Volume 7, Issue 6, November-December 2026
Published On	2026-11-11

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