Security Glossary

Definition

What is Blue Team?

The defensive security team responsible for protecting an organization's assets, detecting attacks in progress, and responding to security incidents. Blue teams operate continuously, monitoring systems, analyzing threat intelligence, and tuning security controls. In purple team exercises, the blue team works alongside red team attackers to improve detection and response capabilities in real time.

Related terms

Red Team →
A group of security professionals who simulate sophisticated, persistent adversaries to test an organization's ability to detect and respond to real-world attacks.
Purple Team →
A collaborative security exercise in which red team (offensive) and blue team (defensive) practitioners work together in real time to simulate attacks and immediately measure detection and response quality.
Security Information and Event Management (SIEM) →
A platform that aggregates, normalizes, and correlates security event data from across an organization's infrastructure to support threat detection, incident investigation, and compliance reporting.
Intrusion Detection System (IDS) →
A monitoring system that analyzes network traffic or host activity for signs of malicious behavior and generates alerts when suspicious patterns are detected.
Put this into practice
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