Strengthening Software Assurance Across Government Systems

Public sector organizations rely on software to deliver essential services, support critical infrastructure, and uphold public trust. As government systems become more interconnected and digital services expand, the security of that software becomes foundational to mission success. Yet despite years of investment, many agencies still find themselves in a reactive cycle – patching vulnerabilities, managing misconfigurations, and responding to incidents after the damage is done.

Secure by Design offers a way to break that cycle by designing security into the product at the onset.

Why Secure by Design Matters for Government Agencies

Public sector environments are uniquely high‑risk. Agencies manage sensitive citizen data, operate essential public services, and often depend on legacy systems that were not built with modern threats in mind. At the same time, adversaries are becoming more sophisticated, and software supply chains are increasingly complex.

Secure by Design helps agencies shift from reactive security to proactive assurance by ensuring that software, whether developed internally or acquired from vendors, is built with security as a core requirement, not an afterthought.

Three factors make this especially important for government organizations:

• Regulatory pressure is increasing. Executive orders, Office of Management and Budget (OMB) memoranda, and federal frameworks now require agencies to demonstrate secure development practices and supply chain due diligence.
• Procurement is a major attack surface. Agencies depend heavily on third‑party software, making it essential to evaluate vendor security practices not just product features.
• Legacy modernization introduces new risks. As agencies migrate to cloud and hybrid environments, they must ensure that new systems are designed with security in mind and that inherited risks are understood.

Secure by Design provides a structured, repeatable way to meet these challenges.

How Secure by Design Supports Public Sector Priorities

Secure by Design aligns naturally with the goals and pressures facing government organizations:

Zero trust implementation. Zero trust architectures depend on secure applications and services. Secure by Design ensures that the software used within that system architecture is built with strong identity, configuration, and application security foundations.

Software supply chain assurance. Agencies can evaluate vendor security practices more effectively by focusing on development rigor, testing discipline, and evidence‑based verification — not just marketing claims or self‑attestation.

Legacy system modernization. As agencies replace legacy applications, Secure by Design helps teams identify inherited risks and ensure that new systems meet modern security requirements.

Operational resilience. By eliminating vulnerabilities early in the lifecycle, agencies reduce long‑term operational risk and free up resources that would otherwise be spent on emergency response.

Secure by Design becomes a bridge between policy requirements and practical implementation – helping agencies demonstrate due diligence while improving real‑world security outcomes.

Key Public Sector Use Cases 

Evaluating Vendor Software and Supply Chain Risk

Agencies can use the Secure by Design assessment model to ask vendors targeted questions about their software development practices, testing rigor, and vulnerability management processes. This helps procurement teams make informed decisions and reduces reliance on self‑attestation alone.

Strengthening Internal Development and DevSecOps Programs

For agencies that build or customize software, the guide provides a roadmap for integrating security into planning, design, coding, testing, and deployment. It supports continuous improvement and aligns with federal DevSecOps initiatives.

Supporting Zero Trust Implementation

Zero trust requires strong identity, configuration, and application security foundations. Secure by Design helps agencies ensure that the applications and services used as part of a zero trust architecture are built securely from the start.

Practical Benefits for Public Sector Leaders

Adopting Secure by Design practices helps agencies:

• Reduce long‑term operational risk by preventing vulnerabilities early in the lifecycle.
• Improve audit readiness with a clear, control‑aligned assessment framework.
• Enhance transparency with vendors and integrators.
• Build public trust by demonstrating a commitment to secure, resilient digital services.
• Optimize limited resources by focusing on the most impactful security activities.

For CIOs, CISOs, procurement officers, and program managers, Secure by Design provides a common language and a shared framework for evaluating software security across teams and partners.

Strengthening Public Sector Resilience 

Secure by Design ultimately supports a broader public mission: delivering trustworthy, secure, and sustainable technology that citizens can rely on. By applying a consistent assessment model across both internally developed systems and third‑party software, agencies can reduce uncertainty, improve procurement confidence, and build more resilient digital services at a time when cyber risk and modernization demands are accelerating.

To help organizations put these principles into practice, CIS and SAFECode developed Secure by Design: A Guide to Assessing Software Security Practices, a comprehensive resource that integrates leading frameworks, maturity models, role‑based guidance, artifact‑driven verification, and considerations for emerging technologies like AI/ML.