Introduction
A successful post-quantum transition is not a single technology replacement. It is a multi-year change programme involving architecture, procurement, software, PKI, identity, infrastructure, suppliers and governance. QSD converts cryptographic exposure and maturity findings into a roadmap that makes priorities, dependencies, decision gates and migration waves visible to both technical and executive stakeholders.
2026 Market & Standards Context
PQC migration planning is increasingly anchored to concrete external milestones. The EU roadmap calls for transition activity to start by the end of 2026 and for critical infrastructure to transition as soon as possible, no later than the end of 2030. The UK NCSC uses 2028 for estate-wide discovery and an initial plan, 2031 for the highest-priority migrations and 2035 for completion. These are not universal legal deadlines, but they are credible planning benchmarks for boards, procurement teams and regulated operators. A robust roadmap should therefore connect cryptographic risk to replacement cycles, supplier lead times, capital planning, testing windows and rollback capacity.
Why It Matters
- High-risk assets are not always the easiest assets to migrate; sequencing must balance exposure, business criticality and technical feasibility.
- Hybrid classical/PQC approaches may be necessary during transition periods to preserve interoperability and rollback options.
- Procurement and supplier roadmaps can become the critical path for crypto-agility if contract and product requirements are not addressed early.
Our Approach
- Establish the transition baseline and target state.
- Prioritise assets using data lifetime, threat exposure, criticality and change complexity.
- Define migration waves, hybrid patterns, testing gates and rollback criteria.
- Create governance, funding, supplier and evidence workstreams so the programme remains auditable and sustainable.
What You Receive
- Executive PQC transition roadmap
- Migration-wave plan and dependency matrix
- Target-state crypto-agility principles
- Hybrid migration and rollback strategy
- Supplier / procurement requirements
- Programme governance and KPI set
Relevant Standards & Context
NIST FIPS 203/204/205 · NIST SP 800-series · NIS2 · DORA · ISO/IEC 27001