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Integritymeans information and systems remain accurate, complete, and protected from unauthorized or improper modification. ThePrinciple of Least Privilegeis a direct integrity protection control because it limits who can change data and what changes they are allowed to make. Under least privilege, users, applications, and service accounts receive only the minimum permissions needed to perform approved tasks, and nothing more. This reduces the chance that an attacker using a compromised account can alter records, manipulate transactions, or change configurations, and it also reduces accidental changes by well-meaning users who do not need write or administrative rights.

Least privilege is commonly enforced through role-based access control, separation of duties, restricted administrative roles, just-in-time elevation for privileged tasks, and periodic access reviews to remove excess permissions. These practices are emphasized in cybersecurity frameworks because integrity failures often occur when excessive access allows unauthorized edits to sensitive data, logs, security settings, or application code.

The other options relate to security but are less directly tied to integrity as the primary objective.Biometric verificationis an authentication method that helps confirm identity; it supports access control broadly, but it does not by itself limit modification capability once access is granted.Anti-malicious code detectionhelps prevent malware that could corrupt data, but it is primarily a detection/prevention tool rather than the foundational control for authorized modification.Backups and redundancyprimarily support availability and recovery after corruption, not the prevention of unauthorized changes.

Anexternal auditis an independent evaluation performed by a party outside the organization to determine whether security-related activities, controls, and evidence meet defined requirements. Those requirements are typically drawn from laws and regulations, contractual obligations, and recognized standards or control frameworks. The defining characteristics areindependenceandattestation: the auditor is not part of the operational team being assessed and provides an objective conclusion about compliance or control effectiveness.

Unlike a vulnerability-focused review (often called a security assessment or technical audit) that primarily seeks weaknesses to remediate, an external audit emphasizes whether controls aredesigned appropriately, implemented consistently, and operating effectivelyover time. External auditors usually test governance processes, risk management practices, policies, access control procedures, change management, logging and monitoring, incident response readiness, and evidence of periodic reviews. They also validate documentation and sampling records to confirm that what is written is actually performed.

Option B describes an internal assurance activity, such as self-assessment or internal audit preparation, where the security team checks its own implementation. Option C is closer to a financial or procurement review and is not the typical definition of an external security audit. Therefore, the best answer is the one that clearly captures anindependent partyreviewing security activitiesto ensure compliancewith established criteria

Designing an audit log report requires clarity onwho is allowed to do what, which actions are considered security-relevant, and what evidence must be captured to demonstrate accountability.Access Control Requirementsare the essential business analysis deliverable because they define roles, permissions, segregation of duties, privileged functions, approval workflows, and the conditions under which access is granted or denied. From these requirements, the logging design can specify exactly which events must be recorded, such as authentication attempts, authorization decisions, privilege elevation, administrative changes, access to sensitive records, data exports, configuration changes, and failed access attempts. They also help determine how logs should attribute actions to unique identities, including service accounts and delegated administration, which is critical for auditability and non-repudiation.

Access control requirements also drive necessary log fields and report structure: user or role, timestamp, source, target object, action, outcome, and reason codes for denials or policy exceptions. Without these requirements, an audit log report can become either too sparse to support investigations and compliance, or too noisy to be operationally useful.

A risk log can influence priorities, but it does not define the authoritative set of access events and entitlements that must be auditable. A future state process can provide context, yet it is not as precise as access rules for determining what to log. An internal audit report may highlight gaps, but it is not the primary design input compared to formal access control requirements.