Defence in Depth Layer 3: Internal Network and Access Security

Internal Network and Access Security: To secure IT systems and valuable information, relying on a single layer of security is risky. Defence in Depth (DiD) is a cyber security strategy that uses multiple layers of security, making it difficult for attackers to breach critical assets. After ‘Email and Web Security‘ and ‘Perimeter Security‘, the third layer of defence is Internal Network and Access Security.

If a cyber criminal breaches the first two security layers, preventing their lateral movement across the network or accessing additional data or IT systems is the next goal.

What is Identity and Access Management (IAM)?

Identity and Access Management (IAM) involves managing user and device roles and access rights for IT systems. IAM ensures that users’ identities are authenticated and that they can access the necessary tools and data for their jobs. The principle of least privilege states that users must have access to strictly necessary data only. Even if a cyber criminal compromises a user’s account, they cannot access sensitive data. Multi-factor authentication is another tool that businesses should enable as it prevents most account compromise attacks.

About Network Segmentation

Network Segmentation divides networks into smaller sub-networks with individual security controls and services. This is then preventing cyber criminals from intruding on business networks and moving laterally. Moreover, this technique also focuses on segmenting cloud environments to improve cloud security and compliance.

A cyber security line in the sand

Importantly, the third layer of defence plays a crucial role in ensuring that hackers cannot access a business’s critical assets, even if they penetrate other security layers. To receive further cyber security content, subscribe below.