What does the concept of "defense in depth" entail?

The concept of "defense in depth" refers to a layered security approach that incorporates multiple measures to protect assets and information. This methodology ensures that if one layer of defense is breached, additional layers will still provide protection, thereby enhancing overall security.

In practice, defense in depth may include a combination of physical security measures, such as access controls and surveillance systems, alongside technical measures like firewalls, intrusion detection systems, encryption, and user training. By using multiple layers, organizations can address various types of threats and vulnerabilities, making it much harder for any single point of failure to compromise the security of the entire system.

Implementing this strategy is crucial in cybersecurity, especially for critical sectors such as marine safety, where the impact of a breach could have significant consequences. The approach acknowledges that no single security measure is sufficient to combat all potential threats, reinforcing the need for a robust and comprehensive security strategy.