Crypto-Agility: The Essential Aspect of Post-Quantum Cryptography

Crypto-agility is emerging as a critical foundation for successful post-quantum cryptography (PQC) migration across UK organisations. As the UK National Cyber Security Centre (NCSC) guides critical infrastructure towards quantum-resistant encryption by 2035 (start by 2026), the ability to adapt cryptographic systems quickly has never been more essential.

Why Crypto-Agility Matters

Crypto-agility refers to the capability to readily support alternative cryptographic algorithm suites without requiring wholesale system overhauls. The NCSC emphasises that organisations need systems where traditional public key cryptography (PKC) and PQC can coexist during migration periods, enabling gradual transitions rather than risky "big bang" replacements. This flexibility ensures businesses can respond to evolving PQC standards and supplier ecosystem developments whilst maintaining operational continuity.

UK Strategic Timeline

The NCSC's three-phase roadmap requires organisations to identify cryptographic services needing upgrades by 2028, execute high-priority migrations between 2028-2031, and complete full PQC transition by 2035. Recent government research through Cambridge Consultants and Capgemini explored how UK critical national infrastructure organisations engage with PQC migration, highlighting the urgency of preparatory work. The Department for Science, Innovation and Technology has backed this with quantum missions establishing the UK as a global quantum leader.

How ICA Consultancy's Cryptgility Services Can Help

ICA Consultancy supports organisations throughout their PQC journey through our dedicated Cryptgility Services, from cryptographic discovery and asset mapping to executive-level risk assessment and compliance alignment.

Our Cryptgility services include:

• Executive Awareness - C-suite and board-level guidance on post-quantum cryptography strategy

• PQC Governance, Risk & Compliance - Comprehensive frameworks for managing post-quantum cryptographic risks

• Cryptgility Assurance - Ensuring crypto-agility is embedded as a business transformation initiative

• PQC Readiness Assessment - Structured maturity assessments and capability gap analysis

We help clients build crypto-agile processes and roadmaps that meet NCSC timelines, conduct dependency analysis to prioritise migration activities, and develop board-ready roadmaps that balance technical requirements with business continuity.

Our expertise ensures your organisation can navigate regulatory frameworks including DORA and PCI whilst establishing the resilience needed to respond to evolving quantum threats and cryptographic standards. Learn more about how we can support your PQC journey or contact us today.