Rethinking The Approach to Cyber Security
Vince Crisler
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Indeed, Cybersecurity is a challenge of resource optimization. People, process, technology as MITRE advocates in its SOC implementation guide. With adversarial approach in mind. I fully support your viewpoint.

The business dimension could be a 4th, supported by processes, which is itself supported by people and technology.

Cyber risk management should guide this resource optimization.