How Does SIEM Work?

Introduction

Security Information and Event Management (SIEM) systems are a cornerstone of modern cybersecurity. They enable organizations to detect, analyze, and respond to security threats in real time by aggregating and correlating security data from various sources. But how does a SIEM work? This blog dives deep into the mechanisms, components, and workflows of SIEM solutions, offering a comprehensive understanding for professionals and enthusiasts alike.

What is SIEM?

SIEM stands for Security Information and Event Management. It combines two primary functions:

1. Security Information Management (SIM): Collecting, storing, and analyzing security-related data from logs and events over time.
2. Security Event Management (SEM): Real-time monitoring, correlation, and alerting based on security events.

Together, these functions provide a holistic view of an organization’s security posture, enabling proactive threat detection and response.

Core Components of a SIEM System

1. Data Collection

SIEM collects data from a variety of sources, including:

• Network Devices: Routers, switches, firewalls.
• Endpoints: Servers…