Question

In a Zero Trust environment, what specific action must be taken to minimize the risk of an attacker moving laterally through a network after gaining initial access?

Accepted Answer

To minimize the risk of lateral movement in a Zero Trust environment, you must implement micro-segmentation. Lateral movement is the process where an attacker who has compromised one device attempts to traverse the network to reach other systems or sensitive data. Micro-segmentation prevents this by dividing the network into small, isolated zones, where each zone contains only one workload or a single type of device. By applying strict access controls to each segment, you ensure that communication between these zones is denied by default. Only traffic that is explicitly authorized based on specific security policies is allowed to pass between segments. If an attacker gains access to one isolated zone, micro-segmentation acts as a barrier that keeps them trapped, preventing them from probing or moving to other parts of the network. This process relies on the principle of least privilege, which dictates that every user and device is granted the minimum level of access required to perform their specific function and nothing more.

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In a Zero Trust environment, what specific action must be taken to minimize the risk of an attacker moving laterally through a network after gaining initial access?