PQC & Quantum Migration • PQ-05
Hybrid PQC Migration
Run classical and post-quantum together until the ecosystem is ready to drop one.
Scope
What the engagement covers.
Hybrid schemes preserve interoperability while adding quantum resistance. This service designs and executes the wave-by-wave transition with fallback that does not silently weaken security.
Included capabilities
- Hybrid profile selection per protocol, channel and counterparty
- Interoperability testing across clients, servers, appliances and vendors
- Wave planning tied to certificate renewal and platform refresh
- Exception handling for systems that cannot migrate, with compensating controls
- Rollback design and change control per wave
Outputs and deliverables
- Hybrid profile specification per protocol
- Interoperability test matrix and results
- Wave migration plan with rollback procedures
- Exception register with compensating controls
Workflow
How it is delivered, step by step.
Each step has an owner, an entry condition and an artefact that has to exist before the next step begins.
01SelectHybrid profiles per protocol with performance and compatibility limits.
02TestInteroperability matrix across the real client and vendor mix.
03PilotOne low-risk wave with full monitoring and rollback rehearsal.
04MigrateSuccessive waves with exception register and compensating controls.
05ConfirmPost-wave verification that negotiation lands on the intended profile.
Use cases
Where this is typically applied.
VPN and secure tunnel modernization across sites
Institutions with counterparty-mandated migration deadlines
Delivery model
The operating pattern for PQC & Quantum Migration.
The same delivery discipline applies across every capability in this line, so combined engagements stay coherent.
Discover
Find every certificate, key, library, protocol and hardware dependency.
Prioritize
Rank by harvest-now-decrypt-later exposure, data life and migration effort.
Design
Hybrid profiles, agility interfaces, PKI and key lifecycle target state.
Migrate
Waves, pilots, fallback paths, exception handling and change control.
Operate
Posture monitoring, algorithm governance, revalidation and reporting.
Integration
- Certificate lifecycle management and PKI platforms already in place.
- HSM estate, key management services and cloud KMS.
- CI/CD pipelines, so crypto inventory stays current as code ships.
- Asset and configuration management for device and endpoint coverage.
Engagement approach
Most clients begin with discovery and risk mapping as a contained first phase, because nothing else can be planned credibly without an inventory. Migration then runs in waves aligned to certificate renewal and platform refresh cycles rather than as a separate programme.
Related
Other capabilities in PQC & Quantum Migration.
PQ-01
Cryptographic Discovery
You cannot migrate cryptography you cannot find.
PQ-02CBOM / SBOM Enrichment
Extend the software bill of materials until it answers cryptographic questions.
PQ-03HNDL / TNFL Risk Assessment
Rank migration by the data that is already being collected against you.
PQ-04Crypto-Agility Architecture
Design so the next algorithm change is a configuration decision, not a rebuild.
PQ-06PKI Modernization
Rebuild the certificate authority estate so it can issue what comes next.
PQ-07Digital Signature Migration
Protect signatures that must remain verifiable for decades.
PQ-08Secure Communication Migration
Make the channels quantum-safe without breaking the people who use them.
PQ-09IoT / OT PQC Migration
The hardest estate: constrained devices with long lives and no easy update path.
PQ-10PQC Test Lab & Validation
A place to break things before production does it for you.
PQ-11Governance & Reporting
Keep a multi-year cryptographic programme honest between milestones.
PQ-12Training & Capability Transfer
Leave the client able to run the programme without the consultant.