Sebastien Rousseau

CATEGORY

Infrastructure & cryptography

Post-quantum cryptography, cloud-native banking, platform engineering, and the engineering stack that runs the rail.

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  • Post-quantum cryptography — 68 articles

    NIST PQ standards, harvest-now-decrypt-later threat, hybrid handshakes, and the migration of banking cryptography to lattice-based primitives.

  • Quantum computing — 24 articles

    Hardware progress, quantum algorithms, the timeline-to-threat, and where quantum compute crosses paths with banking workloads.

  • Cloud-native banking — 23 articles

    Kubernetes, service mesh, multi-region resilience, and the cloud-native architecture patterns banks are adopting under DORA.

  • Platform engineering — 15 articles

    Internal developer platforms, golden paths, paved roads — how banking technology orgs ship engineering productivity.

  • Sovereign cloud — 13 articles

    Data-residency, regulatory-region cloud, and the architectural trade-offs of running banking workloads inside sovereign boundaries.

  • Blockchain — 8 articles

    Distributed ledger technology in financial infrastructure — consensus, validators, smart-contract execution, and where the primitive shows up in banking.

  • Crypto-agility — 7 articles

    Inventorying cryptographic assets, defining a migration path, and shipping replaceable crypto boundaries in production code.

  • Cybersecurity — 7 articles

    Operational security in banking — threats, controls, incident response, and the regulatory expectations around resilience.

  • ML-KEM — 6 articles

    FIPS 203 — the standardised post-quantum key encapsulation mechanism (formerly CRYSTALS-Kyber).

  • Cryptography — 6 articles

    Applied cryptography in banking — hashes, signatures, KEMs, key management, and the cryptographic primitives that secure the rails.

  • Operational resilience — 5 articles

    Important business services, impact tolerances, severe-but- plausible scenarios, and the operational-resilience programme banks must run.

  • Harvest now, decrypt later — 4 articles

    The HNDL threat model — adversaries capturing encrypted traffic today to decrypt once quantum hardware is available.

  • ML-DSA — 3 articles

    FIPS 204 — the standardised post-quantum digital signature algorithm (formerly CRYSTALS-Dilithium).

  • Edge computing — 2 articles

    Edge workers, anti-fraud at the edge, CDN-as-platform — the role of edge compute in financial workloads.

Recent articles in Infrastructure & cryptography

INFRASTRUCTURE & CRYPTOGRAPHY

KyberLib and the Post-Quantum Banking Migration in 2026: From Standards to Code

KyberLib turns the post-quantum banking migration from policy paper into inspectable Rust — FIPS 203 ML-KEM key encapsulation, hybrid classical-plus-quantum handshakes, no_std compilation for HSMs, crypto-agile abstraction boundaries, and the DORA Article 5 governance evidence boards now need.

APPLIED AI

CloudCDN: An Open-Source Blueprint for the AI-Native Edge in 2026

CloudCDN is an open-source blueprint for the AI-native edge — a zero-trust MCP gateway with 42 tools, atomic Durable Objects rate limiting, WebAuthn passkeys, signed URLs, SLSA Level 3 provenance, and 3,185 tests at 100% coverage, mapped to DORA, BCBS 239, and Basel III.

APPLIED AI

The Wholesale Payments Index in 2026: ISO 20022, Tokenised Deposits, Real-Time Rails, and Cross-Border Settlement

An index framework for measuring wholesale-payments readiness in 2026: ISO 20022 structured-address compliance ahead of SWIFT's November 2026 milestone, tokenised-deposit settlement, BIS Project Agorá cross-border atomicity, real-time rail orchestration, and liquidity efficiency. Four percentages — structured-data completeness, rail-routing optimality, settlement-finality lag, and Agorá-corridor coverage — turn payment-operations posture into supervisory-ready evidence.

APPLIED AI

The Cloud Native Banking Index in 2026: DORA, Platform Engineering, Sovereign Cloud, and Operational Resilience

An engineering blueprint for cloud-native banking in DORA audit phase. Five platform-engineering primitives — Kubernetes paved roads, Backstage portal, GitOps via ArgoCD, Open Policy Agent admission, OpenTelemetry end-to-end — produce Article 8 register evidence at the speed of the pipeline. Tested exit-execution annually for CTPP-dependent CIFs against BIA-derived RTO targets. Sovereign-cloud options (AWS European Sovereign Cloud, Microsoft EU Data Boundary, Bleu, Thales / S3NS) addressed as engineering decisions, not branding.

APPLIED AI

The Quantum-Safe Banking Index in 2026: Post-Quantum Cryptography, QKD, Crypto-Agility, and Harvest-Now-Decrypt-Later Risk

An index framework for measuring quantum-safe banking readiness in 2026: cryptographic bill of materials, hybrid TLS deployment, NIST FIPS 203 / 204 / 205 migration progress, crypto-agility primitives, and harvest-now-decrypt-later exposure across long-lived confidential data. The Board-Level Quantum Scorecard defines four exact percentages — inventory completeness, HNDL exposure, NIST migration progress, crypto-agility readiness — that turn project statuses into supervisory-ready evidence.

APPLIED AI

The Agentic AI Index for Banks in 2026: Measuring Autonomy, Governance, Auditability, and Business Impact

An engineering blueprint for agentic AI in tier-1 banks: classify by permissions not intelligence, treat every production agent as an SR 11-7 / SS1/23 model from day one, and build the five-component control plane — OAuth-scoped service accounts, deterministic semantic routing, OPA policy gates, immutable WORM audit logs, and a tested kill switch — that turns autonomous workflows into auditable evidence.

APPLIED AI

Post-Quantum Payments Infrastructure: Why Banks May Replace Rather Than Retrofit Legacy Rails

Harvest-now-decrypt-later turns today's TLS-protected payment messages into tomorrow's decrypted exposure. ML-KEM and ML-DSA are an order of magnitude larger than the RSA and ECC keys legacy rails were sized for — retrofit triggers fragmentation, latency, and HSM exhaustion. The 2026 architectural decision is whether to patch or replace before the regulatory clock runs out.

APPLIED AI

Wholesale Digital Markets in the UK: Tokenised Gilts, Settlement, and the New Champion Role

The UK Wholesale Digital Markets Champion role makes tokenised gilts, DLT-based settlement, and digital wholesale finance a national competitiveness project. The 2026 strategic question for banks is design discipline — which tokenised assets sit on which platform, how settlement risk is evidenced, and how to defend the City's wholesale role against Singapore, Switzerland, and Frankfurt.

APPLIED AI

ISO 20022 After Migration: Turning Payment Data into Banking Products in 2026

ISO 20022 after migration is not a project closeout — it's the start of a data-product opportunity. Structured addresses, purpose codes, invoice details, and rich status events become reconciliation, fraud, liquidity, and compliance products. The 2026 question is design discipline: which payment data carries which client workflow, priced for which corporate.