CRTF / PBA Readiness Guide

How to Prepare Your Product for Independent Cyber Assurance

Executive Summary

Cyber security assurance is changing.

Traditional approaches like certifications, penetration testing, and compliance checklists are no longer sufficient to demonstrate that a product is secure in practice. The UK National Cyber Security Centre (NCSC) has introduced the Cyber Resilience Test Facilities (CRTF) framework, underpinned by Principles-Based Assurance (PBA). Together, they represent a fundamental shift in how technology products are evaluated and trusted.

This shift moves organisations from:

• Self-attestation → Independent validation

• Point-in-time testing → Continuous assurance

• Process compliance → Evidence of real-world security

For technology suppliers, early CRTF readiness is not just a security activity—it is a commercial advantage as procurement expectations evolve.

What Is CRTF? Cyber Resilience Test Facilities (CRTF)

CRTF is a UK government-backed framework designed to enable independent testing and validation of cyber resilience claims made by technology products and services. Its objectives include:

• Increasing trust in technology supply chains

• Providing buyers with credible, consumable assurance

• Reducing systemic risk from insecure products

Rather than relying on supplier statements, CRTF introduces independent, principles-based evaluation of how products are designed, built, deployed, and operated.

What Is Principles-Based Assurance (PBA)? The Methodology Behind CRTF

Principles-Based Assurance focuses on outcomes rather than checkbox compliance. Under PBA, assessors evaluate whether a product:

• Is secure by design

• Is built securely

• Is deployed and operated securely

• Has credible, verifiable supporting evidence

The core principle is simple: It is not enough to have controls. You must demonstrate that they are effective in practice.

Why CRTF and PBA Matter? A Shift in Procurement Expectations

CRTF represents a broader change in how buyers assess risk and trust. Security is no longer evaluated solely by:

• Certificates

• Questionnaires

• Marketing claims

Instead, buyers increasingly expect independent, product-specific assurance that reflects real operational behaviour.

Without CRTF Readiness

Organisations often experience:

• Slower sales cycles

• Repeated security questionnaires

• Increased procurement friction

• Exclusion from public sector or regulated markets

With CRTF Readiness

CRTF-aligned assurance enables:

• Faster procurement approvals

• Reduced due-diligence effort

• Clear differentiation from competitors

• Greater buyer confidence

Who Should Be Paying Attention?

CRTF and PBA are particularly relevant if you:

• Supply to UK government, defence, NHS, or critical infrastructure

• Provide SaaS, cloud, platform, or managed services

• Develop infrastructure, security, or data-sensitive products

Operate in regulated or high-risk sectors If your customers are asking for proof, not promises, CRTF readiness is becoming essential.

What “Good” Looks Like Under Principles-Based Assurance

Successful CRTF assessments demonstrate consistent, well-evidenced security practices across the full product lifecycle.

Secure Design

• Defined security architecture

• Threat modelling conducted and maintained

• Security requirements embedded early

Secure Development

• Secure coding standards enforced

• Code review and testing evidenced

• Dependency and vulnerability management

Build & Supply Chain Security

• Controlled build pipelines

• Protection against tampering

• Visibility of third-party components

Deployment & Configuration

• Secure-by-default configurations

• Hardened environments

• Controlled release processes

Operational Security

• Monitoring and logging in place

• Incident response capability tested

• Active vulnerability management

Maintenance & Updates

• Defined patching processes

• Secure update mechanisms

• Customer communication procedures

Governance & Oversight

• Clear roles and accountability

• Policies aligned to real-world practice

• Evidence that processes are consistently followed

Common Gaps and How to Avoid Them

• Documentation Without Evidence

  • Policies exist, but cannot be substantiated.

  • Fix: Link policies to real artefacts such as logs, tickets, commits, and alerts.

• Fragmented Evidence

  • Evidence exists but is scattered across tools.

  • Fix: Centralise and map evidence to specific assurance claims.

• Inconsistent Practices

  • Security varies across teams or products.

  • Fix: Standardise and enforce repeatable security processes.

• Lack of Ownership

  • No clear accountability for assurance activities.

  • Fix: Assign ownership across the entire product lifecycle.

• One-Off Mindset

  • Security preparation happens only when requested.

  • Fix: Move to a continuous assurance model.

CRTF in Context: How It Compares to Other Frameworks

• CRTF does not replace existing standards it complements them by addressing their limitations.

Approach What It Demonstrates

• ISO 27001 - Organisational security management - limitation is it’s not product-specific

• SOC 2 - Control design and operation - periodic, not continuous Penetration Testing Technical vulnerabilities - point-in-time snapshot

• Secure by Design - security intent - often self-attested

• CRTF / PBA Independent product assurance - evidence-driven, continuous

CRTF focuses on whether a product is secure in practice, not just whether controls exist.

The CRTF Assessment Process

1. Scoping Define the product, scope, and assurance claims.

2. Evidence Collection Gather artefacts across design, development, and operations.

3. Independent Assessment Validate claims against PBA principles.

4. Reporting Produce buyer-consumable assurance outputs and recommendations.

5. Ongoing Assurance Maintain assurance as the product evolves.

Frequently Asked Questions

• Is CRTF mandatory? Not currently. However, CRTF is increasingly expected in UK public sector, defence, healthcare, and regulated procurement.

• Is CRTF only relevant to government suppliers? No. Many private-sector buyers are adopting CRTF-style expectations to reduce supply-chain risk.

• How is CRTF different from ISO 27001 or SOC 2? CRTF evaluates specific products, not just organisational processes, and requires independent validation of real-world security effectiveness.

• Does CRTF replace penetration testing? No. Pen testing remains valuable, but CRTF places it within a broader, continuous assurance context.

• Is CRTF suitable for SMEs and SaaS providers? Yes. SMEs often benefit most as CRTF reduces repetitive due diligence and creates reusable buyer evidence.

• Is CRTF a one-off assessment? No. CRTF is designed for continuous assurance, not one-time certification.

• What do buyers actually receive? Buyers receive clear, independent assurance outputs that are easy to interpret and defensible in procurement decisions.

How SecurLab Supports CRTF & PBA Readiness

We help organisations move from unstructured security practices to independently verified, buyer-ready assurance. Our Services:

• PBA Readiness Assessments

• CRTF Assessments • Assurance Maintenance

• Sanitisation Assurance

Our Approach

• Structured, principles-based methodology

• Deep alignment with UK frameworks

• Focus on commercial and procurement outcomes

Our Differentiator

We don’t just assess, we operationalise assurance.

• Structured evidence management

• Repeatable assessment workflows

• Continuous assurance delivery

Next Steps CRTF readiness is not just about meeting a framework, it’s about making trust easy for your customers.

• Book a CRTF / PBA Readiness Assessment

• Request a product gap analysis

• Speak to an assurance expert info@securlab.io