Purple teaming is a cybersecurity approach in which security teams constantly exercise their defenses against known adversaries’ tactics and techniques to ensure that the defenses work as they should. Because they’re focused on understanding prospective adversaries, they’re ready if and when an intrusion occurs. They’re called “purple” because they combine the best of blue and red teams’ knowledge, skills, and strategies. When they work in close alignment, they conduct continuous assessments to ensure that security programs work as they should to stop advanced threats from both an offensive and defensive position. Absent continuous, adversary-focused testing, there is no way to ensure that a security program will perform in the way that it must at the right time.