Red team, white team, blue team, and black team are terms commonly used to describe the roles and responsibilities of different groups within an organisation that are responsible for security testing and incident response. The terms are often used in the context of military and intelligence agencies, but they can also be applied to other types of organisations. Here is a brief overview of the main differences between these teams:

• Red team: A red team is a group of security professionals who simulate the actions of an attacker and attempt to breach an organisation’s defences in order to identify weaknesses and vulnerabilities. The goal of a red team is to test the organisation’s security controls and incident response capabilities in a realistic and adversarial way.
  
• White team: A white team is a group of security professionals who work to defend an organisation’s assets and systems against external threats. They may be responsible for implementing and maintaining security controls, monitoring for suspicious activity, and responding to security incidents.
  
• Blue team: A blue team is a group of security professionals who work to identify and mitigate internal threats to an organisation. They may be responsible for monitoring employee activity, detecting insider threats, and implementing controls to prevent unauthorised access to sensitive data.
  
• Black team: A black team is a group of security professionals who specialise in covert operations and deception. They may be responsible for conducting covert penetration testing, simulating advanced persistent threats, or developing and implementing deception campaigns.
  

In some cases, these teams may work together to simulate complex and realistic attack scenarios in order to test the organisation’s security posture and incident response capabilities. The specific roles and responsibilities of these teams can vary depending on the needs and goals of the organisation.