How long should we support deprecated API versions under Australian standards?

We recommend maintaining deprecated API versions for 12-24 months minimum, depending on your industry and compliance requirements. Financial services under APRA CPS 234 often require longer support periods, while general businesses can typically work with 12-month cycles. During this period, you must continue applying security patches and maintaining audit logs.

What versioning strategy best suits Australian Privacy Principle compliance?

URI path versioning combined with semantic versioning provides the clearest compliance path for APP requirements. This approach makes version changes explicit and auditable, which is crucial for demonstrating data handling consistency across versions. We implement major versions (v1, v2) in the URI path for breaking changes or significant privacy control updates, while using headers for minor versions.

How do we handle authentication changes across API versions?

Authentication evolution requires careful orchestration to maintain security without disrupting service. We implement a parallel authentication strategy where new versions support enhanced methods (like OAuth 2. 0 or certificate-based authentication) while maintaining legacy support during transition. Create a authentication abstraction layer that operates independently of API versions, allowing security upgrades without version changes.

What security testing is required for each API version?

Each API version requires comprehensive security testing aligned with the Australian Cyber Security Centre's guidelines. This includes automated SAST/DAST scanning in your CI/CD pipeline, penetration testing for major versions, and continuous vulnerability monitoring. We implement version-specific test suites that validate OWASP Top 10 protections, check for information disclosure vulnerabilities, and ensure consistent encryption standards.

How do we manage data schema changes between API versions?

Data schema evolution requires careful planning to maintain data integrity and compliance across versions. We implement a versioned schema registry that tracks all changes and ensures backward compatibility through transformation layers. For personal information under APP guidelines, maintain consistent data minimisation principles across all versions.

What documentation is required for Australian compliance?

Australian security standards mandate comprehensive documentation for all API versions, including detailed change logs, security impact assessments, and data flow diagrams. We maintain version-specific documentation covering endpoint specifications, authentication requirements, data handling procedures, and privacy impact assessments.

How do I implement API versioning to meet Australian security standards?

Implement semantic versioning with URI path strategies, maintain backward compatibility for 12-24 months, document all changes comprehensively, and ensure compliance with APP guidelines for data handling across versions.

Australian businesses struggle to evolve their APIs while maintaining security compliance across multiple versions, risking data breaches and regulatory penalties

Implement a comprehensive API versioning framework with automated security testing, compliance validation, and seamless migration paths

API Versioning for Australian Security Standards Guide

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