Yahoo's cybersecurity department is undergoing significant restructuring under the leadership of their new Chief Technology Officer (CTO). Key aspects include layoffs within the team and the decision to outsource the 'red team' functions, which typically involve simulated attacks to test and improve security measures. This move is anticipated to allow Yahoo to focus on its core competencies while seeking synergies through external partnerships. Some stakeholders believe that this strategic focus on core competencies could enhance shareholder value in the long run.