What does the concept of defense in depth entail?

The concept of defense in depth refers to the implementation of multiple layers of security controls and mechanisms across an organization’s information technology environment. This approach is designed to provide redundancy in security measures, ensuring that if one layer fails or is breached, additional layers remain in place to mitigate risks. These layers can include aspects such as physical security, network security, application security, and user awareness training, all of which work together to create a comprehensive defense strategy.

By employing a multi-layered approach, an organization can better protect its resources and data from various types of threats and vulnerabilities. This strategy is particularly effective against sophisticated attacks, which may bypass one form of security but encounter additional barriers along the way. Therefore, this concept emphasizes the value of having a diverse set of overlapping security measures to enhance overall resilience and protect critical assets.