Increasing Software Complexity and the Need for Transparency
In modern software development, it is rare to write every single line of code from scratch within a single organization.
Most projects are built like puzzles, combining open-source software, third-party libraries, and modules provided by cloud services. While this efficient development approach has dramatically increased development speed, it has also highlighted a serious challenge: the internal structure of software has become a complex “black box.”
The “multi-layered dependencies”—where a library an application depends on in turn depends on another library—make it difficult even for developers to grasp the full picture. In such a situation, once a critical security vulnerability is discovered, immense time and effort are spent just identifying where and to what extent your own systems are exposed to the risk.
Against this backdrop, the importance of a Software Bill of Materials (SBOM)—a machine-readable list of “what a piece of software is made of”—is rapidly increasing.
An SBOM plays a role similar to the ingredient list on food packaging or a bill of materials (BOM) for manufactured goods. By detailing which components from which manufacturers and which versions are included, and through what paths, it becomes a digital foundation that fundamentally supports software transparency.
What an SBOM Visualizes and How It Records Information
An SBOM is not just a list of filenames or library names. It is a “digital asset inventory” that covers the vast number of elements making up a piece of software and structures data on how they relate to one another.
Typically, an SBOM includes the component name, version number, supplier, and the respective license type. Furthermore, by recording unique identifiers known as hash values, it also serves to digitally prove that the component is legitimate and has not been tampered with.
This also functions as a detection feature to prevent malicious code from being slipped into the development process.
Creating this information should not be a static task performed at the final stage of development; rather, it should be a continuous process automatically integrated into the build process. Every time a developer updates the source code and generates an executable binary, advanced scanning tools should run on the CI/CD pipeline to dynamically extract information down to the very end of the dependency tree.
By building this automated mechanism, a “living SBOM” that is always consistent with reality is maintained, making it possible to eliminate omissions and errors caused by manual management.
Three Strategic Benefits Enabling Rapid Risk Response
By introducing an SBOM and operating it as a standard organizational process, you can reap significant benefits in terms of both security and compliance. Specifically, its true value is demonstrated in the following three areas:
1. Immediate Vulnerability Identification and Accurate Impact Assessment
When a new zero-day vulnerability is discovered, having an SBOM allows for an instantaneous cross-sectional search to see if the affected component is included in your systems.
By eliminating the traditional “analog” response of interviewing each team and enabling the identification of components hidden deep within dependency layers in seconds, it becomes possible to apply patches or implement workarounds accurately before attackers can exploit the vulnerability.
2. Avoiding Legal Risks and Loss of Trust Due to License Violations
Different open-source licenses have different terms of use, and depending on the combination, there may be obligations to display copyrights or disclose source code. By visualizing all licenses with an SBOM and automating policy checks in coordination with the legal department, the inclusion of code with restrictions on commercial use can be prevented beforehand.
This is an essential process for protecting intellectual property rights and corporate credibility.
3. Proving the Health of the Software Supply Chain
When providing self-developed software to customers or partners, attaching an SBOM serves as a powerful quality assurance that the product was “manufactured and managed through a secure process.”
This is not just a technical document; it is evidence of business integrity and an important indicator of organizational resilience against the rapidly increasing threat of supply chain attacks.
Enhancing Operational Effectiveness with VEX and Standard Formats
A challenge in operating an SBOM is that even if a vulnerability is found in a listed component, it does not necessarily mean it is “actually exploitable.” This is because, depending on the software’s configuration, the function may not be called, or it may be rendered harmless by other security measures.
This is where the use of VEX (Vulnerability Exploitability eXchange) becomes important.
VEX is a mechanism for adding status information to the vulnerabilities listed in an SBOM, indicating “whether the vulnerability is actually exploitable in that product.”
By operating SBOM and VEX in combination, you can reduce unnecessary alerts for vulnerabilities that do not require a response, creating an environment where security engineers can focus on the high-priority risks that truly need attention.
Furthermore, to achieve such advanced integration, data formats must be internationally standardized. Currently, standard formats such as SPDX and CycloneDX are mainstream. These are highly machine-readable and enable seamless data sharing among various security tools.
Adopting standard specifications is a minimum requirement—a “passport”—for complying with future regulations and participating in the global ecosystem.
Regulatory Trends and the Redefinition of “Trust” in Business
The adoption of SBOM is rapidly shifting from a corporate goal to an entry barrier in international markets or even a mandatory business requirement.
In the United States, a 2021 Executive Order made the submission of an SBOM for government procurement a de facto requirement.
In Europe as well, legislation such as the Cyber Resilience Act is progressing, clarifying legal responsibilities for ensuring the safety of digital products.
In Japan, the Ministry of Economy, Trade and Industry (METI) has formulated guidelines for its introduction, strongly encouraging its spread throughout the industry. This signifies a redefinition of security: it is not just a “defensive cost” but a part of product quality and an “offensive investment” that constitutes a company’s brand value.
Being SBOM-compliant is in itself proof of high-level software governance and a transparent quality management system, serving as a powerful weapon for winning the trust of partners and customers.
Healthier Development Ecosystems Through Continuous Management
An SBOM is not a document that is finished once it is generated and delivered.
Lifecycle management—continuously syncing it to the latest state in line with software updates, component replacements, and newly discovered vulnerability information—is crucial. By thoroughly implementing the “Shift Left” philosophy, which integrates this process from the very top of the development flow, you can prevent fatal reworks where security issues are discovered just before release or after operation has started, thereby maximizing development efficiency.
Creating an environment where software components are transparent and both the supplier and the user can discuss risks based on objective data directly leads to a healthier development ecosystem as a whole.
The reliable information obtained through an SBOM serves as a “bridge of trust” for developers, operators, and end-users to continue enjoying the benefits of technology with peace of mind in an increasingly complex digital society.