(also Layered security)
Defense In-Depth definition
Defense in Depth aka (DiD) is an approach or cybersecurity strategy that involves multilayered defense mechanisms and various measures that protect networks and computer systems to save vulnerable data and information from unauthorized access and potential threats. It works like multiple security fences. If one layer fails, another steps up to withstand the possible cyber attack. This in-depth architecture performs well and can help better understand various attack vectors, like network attacks, malware infections, and even social engineering.
Key principles of the Defence in Depth:
Multi-layered security: This principle includes multiple layers of security, like intrusion detection systems, encryption, various firewalls, and antivirus software. These layers create walls or barriers to minimize the impact on overall security.
Defense of critical assets: This methodology focuses on protecting the most valuable data or critical resources in the system. Naturally, more robust security measures are created around critical information and targets. That way, organizations can allocate resources and focus on protecting what is important.
Monitoring and response: This method involves security team input through real-time network and system activity monitoring. This continuous inspection, threat detection, and fast response capabilities can prevent further system or network compromisation or persistent cyber-attacks.
Diverse defense measures: Different security measures are employed at each layer to ensure strength throughout the entire system. Other layers protect the system if any layers fail to withstand the attack. Anyway, this approach requires automated and physical controls.
Redundancy and resilience: In this method, redundancy is promoted. Data and system backups are implemented to maintain operations steady if a security breach or system failure occurs.