ISO 27001 mandates audit logging as part of Annex A controls for information security event logging, protection of log information, and administrator activity logging.
ISO 27001 is the international standard for information security management systems (ISMS). The 2022 revision reorganized controls into four themes: Organizational, People, Physical, and Technological. Audit logging falls primarily under Annex A control A.8.15 (Logging) and A.8.16 (Monitoring activities). Organizations must produce logs, protect them from tampering, and review them regularly. ISO 27001 certification is recognized globally and increasingly required for cross-border business.
ISO 27001:2022 contains 93 controls organized into 4 themes (reduced from 114 in the 2013 version)
Control A.8.15 explicitly requires protection of logs against tampering
Certification requires annual surveillance audits and recertification every 3 years
Over 70,000 organizations worldwide hold ISO 27001 certification
Retention period: Organization-defined, typically 1-3 years (must align with risk assessment)
Produce, store, protect, and analyze logs that record activities, exceptions, faults, and information security events. Logging facilities and log information must be protected against tampering and unauthorized access.
How AuditKit helps: Immutable hash chain logging with cryptographic tamper detection
Networks, systems, and applications must be monitored for anomalous behavior. Appropriate actions must be taken to evaluate potential security incidents.
How AuditKit helps: SIEM streaming enables real-time anomaly detection and alerting
Processes for acquisition, use, management, and exit from cloud services must include logging and monitoring requirements.
How AuditKit helps: Multi-tenant isolation ensures cloud audit data is properly segregated
Information stored in systems and devices must be deleted when no longer required. Deletion events must be logged.
How AuditKit helps: Structured event logging captures data lifecycle events including deletion with full context
ISO 27001 Annex A control A.8.15 requires organizations to produce, store, protect, and analyze logs recording activities, exceptions, faults, and security events. Logs must be protected from tampering and unauthorized access. AuditKit provides cryptographic tamper protection through SHA-256 hash chains and Merkle tree proofs.
AuditKit directly addresses ISO 27001 controls A.8.15 (Logging), A.8.16 (Monitoring), and A.5.23 (Cloud Security) by providing immutable audit trails, real-time SIEM streaming, and tenant-isolated logging. The built-in React viewer gives auditors a clear interface to review evidence.
SOC 2 requires organizations to maintain comprehensive audit logs that track user activity, system changes, and security events across all trust services criteria.
GDPR requires organizations to demonstrate accountability through records of processing activities and maintain audit trails for data access, consent changes, and data subject requests.
NIS2 requires essential and important entities across the EU to implement cybersecurity risk management measures including audit logging, incident reporting, and supply chain security monitoring.
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