What is the principle of defense in depth?

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What is the principle of defense in depth?

The principle of defense in depth is a security strategy that involves implementing multiple layers of security measures to protect against potential threats. This approach aims to provide multiple barriers and safeguards, ensuring that if one layer is breached, there are additional layers in place to prevent further unauthorized access or damage. By employing a combination of technical, procedural, and physical controls, defense in depth helps to minimize the impact of security breaches and enhance overall system resilience.