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Governance, Risk, Audit & Privacy · Foundational

Preventive Control

Control designed to stop an undesired event from occurring.

Definition

Preventive controls include access controls, encryption, firewalls, segregation of duties, and input validation. They are generally preferred because they avoid loss altogether. They should be complemented by detective controls since prevention can fail.

Example

Requiring a badge to open a server room door prevents unauthorized entry.

Exam tip

Prevention is preferred, but defense in depth needs detection and correction too.

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