Blue Team

Definitions

1. The defensive security team responsible for detecting, responding to, and mitigating attacks — the counterpart to red teams. Includes SOC analysts, incident responders, and security engineers.

   In plain English: The security team that watches for attacks and defends the systems — the guards to the red team's simulated burglars.

2. In cybersecurity exercises, the blue team defends against the red team (attackers). A purple team combines both functions, with attackers and defenders collaborating to improve security. In practice, most security professionals are blue team — defense is a 24/7 job.

   Example: 'Our blue team detected the simulated breach within 20 minutes using the new SIEM rules. Last quarter it took 4 hours.'

   Source: exercise context

Etymology

1960s

Originates alongside Red Team in military wargaming — the Blue Team defends against simulated attacks

2000s

Cybersecurity adopts the Blue Team concept for defensive security operations, SOC analysts, and incident responders

2017

The 'Purple Team' concept emerges, advocating collaboration between Red and Blue teams rather than adversarial separation

Related Terms

• Honeypot
• Red Team
• Canary Token
• ICS Security
• Modbus Security
• OT Security
• Remote Attestation