seela logo

Cybersecurity: the Red Team vs. the Blue Team

August 28, 2023

Reading time : 5 min


Cybersecurity has become a crucial issue in our connected world, where online threats are omnipresent.

In this article, we take an in-depth look at the concepts of Red Team and Blue Team, two essential approaches to guaranteeing comprehensive protection against cyber attacks.

🥷 Understanding the Red Team: Thinking like a hacker

Red Team is a proactive approach to identifying system vulnerabilities from an attacker's point of view.

Red Team professionals, also known as Pentesters or Ethical Hackers, use advanced techniques to simulate real-life attacks and discover potential flaws in a network, application or infrastructure.

This approach enables us to anticipate the methods that cybercriminals might use, and to reinforce security in a targeted way.

illustration top 5 ctf

Key stages in the Red Team approach

  1. Deep Reconnaissance: The first step is to gather in-depth information about the target, including its topology, exposed services and known vulnerabilities.

  2. Scanning and Identification: Red Team uses advanced scanning tools to discover open ports, active services and potential vulnerabilities.

  3. Exploitation and Penetration: By exploiting identified vulnerabilities, Pentesters seek to penetrate the system, thus imitating the actions of a real attacker.

  4. Elevation of Privileges: Once inside the system, the aim is to gain elevated privileges to access sensitive information.

  5. Maintaining access: The Red Team attempts to maintain access to the system in order to assess its detection by the Blue Team.

🛡️ The Blue Team: Guarantor of Defense and Response

In contrast to the Red Team, the Blue Team is responsible for defending against and responding to cyber-attacks. Blue Team professionals, such as SOC Analysts and Security Coordinators, work to strengthen security by identifying and neutralizing potential threats.


Key roles in the Blue Team

  1. Continuous monitoring: The Blue Team constantly monitors the network and systems using advanced detection tools to spot any suspicious activity.

  2. Threat analysis: SOC analysts analyze behaviors and indicators of compromise to determine the nature and scale of attacks.

  3. Incident Response : In the event of a proven attack, the Blue Team implements measures to contain, eradicate and recover affected systems.

  4. Continuous improvement: By learning from past incidents, the Blue Team constantly adjusts security strategies to reinforce the overall posture.

👀 The Marriage of Two Worlds: Purple Team Approach

The Purple Team approach, also known as "Team Violette", occupies a crucial place in the modern cybersecurity landscape. It emerged in response to the need to combine the strengths of the Red Team and the Blue Team for enhanced security and optimal collaboration. The fundamental idea behind the Purple Team is to create a bridge between attack and defense, fostering continuous dialogue and information sharing between the two teams.

  • Constructive Dialogue: The Purple Team encourages open and transparent communication between Red Team and Blue Team experts. This constant communication enables teams to better understand attacker tactics and detection methods, reinforcing the overall Cybersecurity posture.
  • Ongoing evaluation: Purple Team sessions consist of collaborative simulations in which the Red Team exposes its methods and attack scenarios to the Blue Team. This exposure to real-life hacking techniques enables the Blue Team to adjust its detection and response strategies in real time.
  • Agile adaptation: By observing the Red Team's tactics and taking an active part in detecting attacks, the Blue Team can identify vulnerabilities that might otherwise have gone undetected. This agility means that security measures can be rapidly adapted to counter new threats.
  • Strengthening Prevention: The Purple Team promotes proactive prevention by identifying potential vulnerabilities before they are exploited by real attackers. This helps to minimize risk and strengthen the resilience of IT infrastructure.


In short, the Purple Team approach embodies the spirit of collaboration and synergy in Cybersecurity. By combining the offensive skills of the Red Team with the defensive mechanisms of the Blue Team, organizations are better prepared to deal with today's complex digital threats. This approach is at the heart of Seela's mission, which is to train Cybersecurity experts capable of mastering these strategies for comprehensive and dynamic protection.

logo cyber training

Start your cybersecurity training!

Launch your career in cybersecurity and train for the job that fits you. Our online platform allows you to train at your own pace for a quick and efficient increase in skills.

100% online

Theory & Practice

Customized by level

Start your cybersecurity training




100% online

Breathe new life into your career with our cybersecurity training courses