Software Supply Chain Security
Governance, Policy, and Program Framework for Software Supply Chain Risk — From Dependency Policy to CISA Attestation
Pipeline Security Implementation secures how you build. Software Supply Chain Security governs what you build with and who you build on. This is the policy and program layer — dependency risk management, SBOM lifecycle, supplier assessment, and regulatory alignment.
The engagement produces a dependency risk policy defining acceptable risk thresholds for open-source and third-party components, an SBOM program covering generation, distribution, and consumption workflows, a tiered supplier security assessment framework (Tier 1 full assessment, Tier 2 OpenSSF Scorecard evaluation, Tier 3 monitoring), a SLSA alignment roadmap, and a software transparency package aligned to CISA attestation requirements.
This is the governance complement to Pipeline Security Implementation. Together, they cover both the technical controls and the organizational program needed for comprehensive supply chain security.
Who This Is For
Ideal clients for this engagement.
The Problem
What this engagement addresses.
No Dependency Risk Policy
Most organizations have no formal policy for evaluating open-source dependency risk. Developers adopt libraries based on functionality without assessing maintenance status, security history, or supply chain risk. The result is unmanaged transitive risk across the software portfolio.
SBOM as Checkbox, Not Program
Generating SBOMs to satisfy a customer request is not a supply chain security program. Without defined generation standards, distribution workflows, consumption processes, and lifecycle management, SBOMs are compliance artifacts with no security value.
Supplier Assessment at Scale
Assessing every software supplier with the same depth is neither practical nor necessary. A tiered approach based on criticality, data access, and integration depth is required — but most organizations lack the framework to implement it.
Regulatory Fragmentation
CISA attestation, EU Cyber Resilience Act, NIST SSDF, SLSA, and customer-specific requirements create overlapping and sometimes conflicting supply chain security demands. A unified program must map to all of them without duplicating effort.
Deliverables
What you receive.
Dependency Risk Policy
Formal policy defining acceptable risk thresholds for open-source and third-party dependencies. Risk scoring criteria, exception process, and escalation procedures. Integrates with dependency scanning tooling.
SBOM Program Design
End-to-end SBOM program: generation standards (format, frequency, tooling), distribution workflows (customer delivery, internal consumption), consumption processes (vulnerability correlation, license compliance), and lifecycle management.
Supplier Security Assessment Framework
Tiered assessment framework: Tier 1 (critical suppliers — full security assessment), Tier 2 (significant suppliers — OpenSSF Scorecard evaluation and questionnaire), Tier 3 (standard suppliers — automated monitoring and alerting). Questionnaire templates and scoring criteria included.
SLSA Alignment Roadmap
Gap analysis against SLSA Build Levels with a phased roadmap to target level. Maps current build practices to SLSA requirements and sequences improvements by impact and feasibility.
Software Transparency Package
Documentation package aligned to CISA Secure Software Development Attestation requirements. Includes evidence mapping, attestation narrative, and gap remediation plan.
Methodology
How the engagement works.
Current State Assessment
Weeks 1 – 2
- Dependency landscape analysis — direct and transitive dependency inventory
- Current SBOM practices and tooling assessment
- Supplier inventory and criticality classification
- SLSA gap analysis against current build practices
- Regulatory requirement mapping (CISA, EU CRA, customer requirements)
Policy & Framework Development
Weeks 3 – 5
- Dependency risk policy development with stakeholder review
- SBOM program design — generation, distribution, consumption
- Supplier security assessment framework and tiering criteria
- SLSA alignment roadmap development
Documentation & Handoff
Weeks 6 – 8
- Software transparency package assembly (CISA attestation alignment)
- Implementation guidance for engineering and procurement teams
- Stakeholder review and approval workflows
- Knowledge transfer and program launch support
Engagement Tiers
Scoped to your architecture.
Foundation
Dependency risk policy and SBOM program design. For organizations starting their supply chain security governance journey.
- Dependency risk policy
- SBOM program design (generation, distribution, consumption)
- SLSA gap analysis
- Implementation guidance
Standard
Full supply chain governance program including supplier assessment framework and SLSA roadmap. For organizations with regulatory or customer-driven requirements.
- Everything in Foundation
- Supplier security assessment framework (3 tiers)
- SLSA alignment roadmap
- Software transparency package (CISA attestation)
Comprehensive
Enterprise program with multi-product coverage, advanced supplier assessment, and regulatory mapping across CISA, EU CRA, and customer-specific requirements.
- Everything in Standard
- Multi-product portfolio coverage
- Extended regulatory mapping (EU CRA, customer-specific)
- Executive reporting framework for supply chain risk
Prerequisites
- Access to dependency manifests and build configurations across key products
- List of current software suppliers and third-party components
- Customer and regulatory requirements driving supply chain security needs
- Stakeholder availability for policy review and approval (engineering, legal, procurement)
Frequently Asked Questions
Common questions.
How does this relate to Pipeline Security Implementation?
Pipeline Security Implementation is the technical controls — artifact signing, SBOM generation, admission control implemented in your CI/CD pipelines. Software Supply Chain Security is the governance layer — the policies, programs, and frameworks that define what gets built, what risk is acceptable, and how suppliers are assessed. Most organizations need both.
Do we need this if we already generate SBOMs?
Generating SBOMs is one step. An SBOM program includes generation standards, distribution workflows (how do SBOMs reach customers and internal consumers?), consumption processes (how are SBOMs used for vulnerability correlation and license compliance?), and lifecycle management. Most organizations that generate SBOMs have not built the program around them.
What is the CISA Secure Software Development Attestation?
A U.S. government requirement for software vendors selling to federal agencies. It requires attestation that software was developed following secure development practices aligned with the NIST SSDF. The software transparency package delivered in this engagement maps your practices to attestation requirements and identifies gaps.
Related Offerings
Often paired with this engagement.
Pipeline Security Implementation
Technical complement — implement artifact signing, SLSA provenance, SBOM generation, and admission control in your CI/CD pipelines.
AppSec Program Design
Broader application security program that incorporates supply chain security as one component of a complete SDLC security framework.
Security Program Strategy
Strategic planning that positions supply chain security within your overall multi-year security roadmap and investment priorities.
Ready to discuss this engagement?
30-minute discovery call. We will discuss your application architecture, your specific concerns, and whether this assessment is the right fit.