Software & SaaS | Modelled case study
Offer in-region cryptographic custody for sovereign deals
Can we offer customers in-region cryptographic custody without rebuilding the product?
Reviewed as of 2026-10-26 · primary scenario
The modelled organisation
A recognisable problem reaches the operating agenda
This composite scenario follows the CTO · Data Protection Officer · Platform Lead functions. It is grounded in the cited problem context but does not identify a real customer.
Operating environment
A software provider ships frequent releases through source, build, package, deployment, dependency, and customer-assurance systems.
What is at stake
Customers and regulators need to distinguish an authorized release and evidenced control from a claim assembled after an incident.
Situation
Sovereign-cloud and data-residency deals increasingly demand customer-controlled or in-region key custody with evidence, and multi-tenant SaaS stacks cannot answer with a single HSM vendor quote.
Event that forces action
Enterprise RFP residency clauses, CSA Cloud CCOP expectations, or regulated-market entry.
Concrete system boundary
Systems this case study puts in scope
The model is specific about the operational surfaces that must be discovered, changed, or independently checked.
tenant-bound custody topology
BYOHSM and REST custody paths
key-location evidence
customer migration options
Modelled case study walkthrough
How this organisation would use QNSI
The walkthrough connects the real-world problem to a bounded QNSI contribution and an independently reviewable result.
Recognise the operating condition
Sovereign-cloud and data-residency deals increasingly demand customer-controlled or in-region key custody with evidence, and multi-tenant SaaS stacks cannot answer with a single HSM vendor quote.
Frame the decision the owners must make
Can we offer customers in-region cryptographic custody without rebuilding the product?
Apply QNSI to the controlled boundary
Run tenant-bound custody in-region through QNSI BYOHSM/REST custody paths and policy tiers, with signed custody evidence.
Leave the team with a concrete result
A residency offer: custody topology, key-location evidence and customer-controlled migration options.
Prove the result in the organisation's environment
Legal confirms residency scope; platform verifies HSM boundaries and failover behaviour.
What useful success looks like
A decision artifact plus proof from the real environment
The model stops at a target result. It becomes an actual case study only when a customer produces and independently validates this evidence in production.
Decision artifact
A residency offer: custody topology, key-location evidence and customer-controlled migration options.
Independent validation boundary
Legal confirms residency scope; platform verifies HSM boundaries and failover behaviour.
Real-world problem grounding
Primary sources behind the model
These sources establish the external requirement, failure mode, or risk context used to model this case. They do not endorse HEOSSI or prove that QNSI completed the scenario.
Customer evidence status
This is modelled, not a customer claim
The organisation is a composite and the result is a target state. This page does not prove a deployment, customer outcome, certification, legal conclusion, regulator endorsement, or completed control.