Service / PQC & Quantum Migration

Digital Signature Migration

Modernize signing systems and long-term validation so integrity, authenticity and non-repudiation remain sustainable through the quantum transition.

Business context

What this capability solves

Signatures may need to remain verifiable for years or decades. Migration affects keys, certificates, document formats, validation services, timestamps and archived evidence.

EBP Integra delivery principle

Technology is implemented as an operating capability: architecture, integration, governance, assurance, people, procedures and measurable outcomes are designed together.

Deep-dive capabilities

Capability model

Modular building blocks allow the scope to start with a focused pilot and expand into an enterprise operating model.

Signing Inventory

Document, code, transaction, firmware and identity-signing use cases.

Validity Horizon

Classify how long signatures must remain trustworthy.

Target Profiles

Select transition/hybrid/PQC approaches based on ecosystem support.

Long-Term Validation

Assess timestamping, archival evidence and re-validation/re-signing strategies.

Code / Firmware Signing

Protect software supply chain and device update trust.

Interoperability

Coordinate signers, verifiers, partners and regulatory requirements.

Reference architecture

How the capability fits together

Final topology, control placement and deployment model are validated during discovery and detailed design.

Inventory & Evidence

Assets, algorithms, protocols, keys, certificates, libraries, firmware, owners and dependency graph.

Risk & Governance

Data lifetime, HNDL/TNFL exposure, criticality, migration difficulty, target profiles and exception authority.

Migration Engineering

Hybrid algorithms, PKI/HSM/KMS, protocols, applications, devices, interoperability and test environments.

Continuous Crypto-Agility

Rescans, posture dashboard, key rotation, retirement, vendor tracking, evidence and assurance.

Controls & governance

Approved cryptographic profile registry
Hybrid-first transition where compatibility requires it
No untested algorithm replacement in production
Key/certificate lifecycle and fallback controls
Vendor and firmware dependency tracking
Independent test evidence for critical systems
Exception ownership and retirement dates

Priority use cases

Document signing
Code signing
Firmware signing
Transaction authorization
Long-lived archives

Key deliverables

Signature inventory
Validity classification
Target architecture
Pilot signing flow
Archive strategy
Migration roadmap

Integration considerations

CMDB/asset inventory
PKI/HSM/KMS
Network/security platforms
Application/CI-CD dependencies
Cloud and SaaS configuration
IoT/OT device inventory
GRC/remediation workflow

Implementation

Phased delivery

Each phase ends with evidence, acceptance criteria and a decision gate before broader scale-out.

1. DiscoverEstablish authoritative crypto inventory and ownership.

2. PrioritizeRisk-rank exposure using data lifetime, criticality and migration effort.

3. PilotValidate target/hybrid profiles and interoperability in controlled environments.

4. MigrateExecute waves, rekey, retire legacy, rescan and maintain evidence.

Outcome and KPI framework

Long-lived signature coverageVerifier compatibilityLegacy signature reductionRe-signing backlogSigning failure rate