Defence-in-depth is a cybersecurity strategy that employs multiple layers of security measures to protect against cyber attacks. The idea behind defence-in-depth is to create a multilayered system of security controls that can defend against a wide range of threats, from known vulnerabilities to zero-day exploits.
Defence-in-depth typically includes a combination of technical and non-technical security measures, including firewalls, intrusion detection systems, antivirus software, encryption, access controls, and security awareness training for employees. The goal is to create a comprehensive security architecture that can detect and prevent cyber attacks at multiple points in the environment.
The principle of defence-in-depth is that even if one layer of security is bypassed, there will still be additional layers in place to detect and respond to the attack. This approach is designed to be proactive and preventative, rather than reactive, and helps to reduce the risk of a successful cyber attack.
In short, defence-in-depth is a multi-layered approach to cyber security that takes into account the full range of potential threats and provides multiple layers of protection to defend against them. By implementing multiple security measures, organisations can significantly reduce their risk of a successful cyber attack and protect their valuable assets.
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