Banking & payments · API Security Architect · Open Banking Product Owner
Introduce hybrid post-quantum protection at an open-banking API boundary
Where can quantum-resistant handshakes be introduced while legacy aggregators still require classical interoperability?
Operational pain
The bank controls its gateway but not every client library, certificate stack, or third-party aggregator, making an all-at-once protocol cutover commercially unsafe.
Trigger
A new API gateway, long-lived consent data, or a regulated partner asks for a quantum-safe roadmap.
QNSI contribution
Connect the decision to a controlled security path
Use QNSI policy tiers and conformance evidence to define native-PQC, hybrid, and exception cohorts without claiming that telemetry alone proves PQC transport.
Decision artifact
A partner-by-partner negotiation matrix with downgrade rules, test vectors, expiry dates, and evidence gaps.
What still requires validation
Each client path requires packet-level verification, performance testing, certificate-policy review, and explicit downgrade acceptance.
External problem context
Primary sources
These sources establish the external requirement or risk context. They do not endorse HEOSSI or prove that QNSI completed this scenario.
Evidence boundary
What this page does—and does not—prove
This is a product evaluation pattern, not a customer case study, certification, legal opinion, regulator endorsement, or claim that a production deployment completed the described work.