threat-intel
Walmart's "Trusted Agent" Approach to Purple Teaming
Medium
Summary
Walmart has shifted its purple teaming strategy from a competitive red/blue team dynamic to a collaborative approach focused on building trust and continuous improvement. By co-locating teams, implementing a ‘trusted agent’ model where observers actively provide feedback to the defensive team, and emphasizing organizational learning over individual wins, Walmart has fostered a security operations culture that boosts staff retention and elevates the overall security posture.
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