Software Bills of Materials have become an important foundation for software transparency, giving organizations greater visibility into the components and dependencies embedded within increasingly complex products. That visibility can support vulnerability analysis, supply-chain risk management, incident response, security updates, and other lifecycle cybersecurity activities, but the value of an SBOM ultimately depends on whether the information it contains can be trusted.
An SBOM may satisfy a contractual, procurement, or regulatory expectation while still providing limited operational value if components are missing, versions are incorrect, dependencies are poorly represented, or the information no longer corresponds to the software actually released. The challenge is therefore moving beyond the question of whether an SBOM exists and determining whether it provides sufficiently reliable evidence for the cybersecurity decisions organizations need to make.
Our new white paper, Beyond Compliance: An SBOM Assurance Certification Model for ISA/IEC 62443, introduces an assurance model built around five complementary dimensions: Process, Provenance, Completeness, Correctness, and Operational Assurance. Together, these dimensions evaluate not simply the SBOM artifact, but the processes, controls, technical evidence, and lifecycle practices responsible for producing and maintaining trustworthy software composition information.
Asset owners increasingly need software composition information to support vulnerability response, supplier governance, security updates, asset visibility, and operational risk management. Independent assurance can provide greater confidence that an SBOM is connected to an actual product release, supported by traceable evidence, sufficiently complete for its declared purpose, and maintained as the product evolves.
This becomes especially important when an organization must determine whether a newly disclosed vulnerability affects deployed products. The usefulness of the SBOM depends on the reliability of the underlying software evidence, not simply possession of the file.
For suppliers, SBOM assurance creates an opportunity to demonstrate more than compliance with a documentation requirement. A supplier can provide objective evidence that software composition information is generated through controlled processes, validated against technical evidence, integrated with vulnerability handling and security-update activities, and maintained throughout the product lifecycle.
Independent certification can also help address the information imbalance between suppliers and customers. Customers generally do not have direct visibility into a supplier's repositories, dependency-management practices, build systems, release controls, or validation activities, so an independent assessment can provide a structured basis for confidence without transferring responsibility for product security away from the supplier.
The paper places these concepts within the lifecycle-security objectives of ISA/IEC 62443, while making an important distinction: an SBOM does not independently demonstrate compliance with ISA/IEC 62443. Instead, trustworthy software composition information can strengthen the evidence supporting secure development, vulnerability handling, security updates, supplier governance, configuration management, and operational cybersecurity activities.
The direction is clear: the objective should not be to certify that an SBOM was produced, but to establish justified confidence in the capability that produces, validates, maintains, and operationalizes the information.
For asset owners, that means better evidence on which to base cybersecurity decisions. For suppliers, it means a credible mechanism for demonstrating the maturity and reliability of software transparency practices.
That is the transition from SBOM compliance to SBOM assurance.