Definition
An Audit of Security is a systematic review and examination of an organization's information security policies, procedures, and controls. It assesses whether these measures are effectively implemented, meet compliance requirements, and adequately protect assets from threats. In practice, auditors verify security configurations, review access logs, and interview personnel to identify vulnerabilities and non-compliance. This process is crucial for ensuring data integrity, maintaining customer trust, and preventing costly security breaches. For instance, an audit might involve checking that all employee access permissions are regularly reviewed and revoked upon termination. A common misunderstanding is confusing an audit with a penetration test, which actively attempts to exploit vulnerabilities rather than just assessing existing controls. This concept is fundamental to certifications like CompTIA Security+ and CISSP.