An information security audit is a formal assessment of an organisation’s security controls, policies, and processes to determine effectiveness and compliance with relevant standards. In Australia, information security audits often evaluate alignment with ISO 27001, Essential Eight maturity levels, APRA CPS 234, or internal governance requirements. The audit process typically includes documentation review, control testing, vulnerability assessments, and interviews with key personnel. An information security audit identifies gaps in control implementation, weaknesses in access management, and deficiencies in incident response procedures. Findings are documented in a structured report with prioritised remediation recommendations. Conducting regular information security audits strengthens governance oversight, supports regulatory compliance, and demonstrates due diligence to stakeholders and customers.