Does defense in depth still work against today's cyber threats?
Yes. But not for much longer unless the industry shifts to an automated security and zero trust model. When it was first applied to the cybersecurity industry some 15 years ago, defense in depth revolutionized the business. Today, the idea of using a collection of security countermeasures to protect a network is an accepted best practice and traditional thought leaders in the cybersecurity space (financial services companies and the U.S. federal government) hold it as gospel.
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