As the world becomes increasingly digitized, the risk of cyberattacks against businesses, governments, and individuals alike has increased dramatically. Hackers can gain access to sensitive data, steal identities or financial information, or damage computer networks and critical infrastructure.
"Defense in depth" is a security strategy that employs multiple layers of security controls to protect resources and data. By implementing multiple layers of security, an organization can reduce the risk of a single security control being compromised and increase the overall security of the organization. Defense in depth can be implemented at the organizational level or at the individual level.
Organizational Defense in Depth
At the organizational level, defense in depth can be implemented by deploying multiple security technologies across the organization. For example, an organization might deploy a firewall, an intrusion detection system, and a malware prevention system.
Individual Defense in Depth
At the individual level, defense in depth can be implemented by using multiple security controls to protect individual resources. For example, an individual might use a password to protect their account, a firewall to protect their computer, and anti-virus software to protect their files.
Typical Approach to Organizational Defense in Depth
The first layer of defense is typically the firewall, which is a network security tool that blocks unauthorized access to the network. The firewall can be configured to allow or deny access to specific users, IP addresses, or ports.
The next layer of defense is typically the antivirus/anti-malware software, which is used to detect and remove malware from the system. It can also be used to identify infected files and prevent them from being opened or executed. Add in threat detection and you have EDR
The next layer of defense is the intrusion detection and prevention system (IDS/IPS). IDS/IPS is a network security tool that monitors network traffic for signs of malicious activity. It can be used to detect and prevent attacks such as Denial of Service (DoS) and SQL injection. Add in behavioral learning and threat detection and you have NDR
The final layer of defense is the security awareness and training program. This is important, as it helps to educate employees on how to protect themselves from cyberattacks. Employees should be aware of the types of attacks that are being used, and how to protect their personal information.
Organizations should also consider using a security operations center (SOC) to help detect and respond to cyber threats. The SOC monitor's the organization for attacks, allowing for quicker discovery and response to any breaches.
By implementing multiple layers of defense, organizations can reduce the chances of a successful cyberattack.