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 — 73 articles

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

  • Quantum computing — 25 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.

  • Crypto-agility — 9 articles

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

  • Blockchain — 8 articles

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

  • ML-KEM — 8 articles

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

  • Cryptography — 8 articles

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

  • Cybersecurity — 8 articles

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

  • Operational resilience — 7 articles

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

  • Harvest now, decrypt later — 6 articles

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

  • ML-DSA — 5 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

PAYMENTS & MONEY

Always-On CIB: Cyber Recovery, Fallback Rails and Quantum-Safe Treasury

Corporate and investment banks now treat cyber recovery, ISO 20022 fallback rails across RTGS, instant and tokenised networks, and quantum-safe treasury controls as one always-on operating model — the board-grade response to DORA Articles 5 and 6, FHE, QKD and PQC primitives, and ICT third-party concentration risk.

PAYMENTS & MONEY

The Post-Quantum Banking Resilience Index in 2026: EO 14409, Global Deadlines, and Fiduciary Cryptographic Agility

Executive Order 14409, ANSSI's hard 2030 deadline and DORA Article 5 have moved post-quantum cryptography from a long-range technical goal to an active regulatory mandate. This index converts securing registries, high-frequency ledgers and SWIFT channels into a board-ready 0–5 scorecard that aligns ML-KEM, ML-DSA and SLH-DSA primitives with fiduciary liability and balance-sheet risk.

INFRASTRUCTURE & CRYPTOGRAPHY

Quantum Dawn for CIB: From KyberLib to a Quantum-Resilient Payments Stack

BIS Quantum Dawn and the G7 January 2026 PQC roadmap have moved post-quantum cryptography from research to board agenda. This piece extends KyberLib from a toolkit into an enterprise CIB transition programme — covering high-value rails, trade finance, custody, and the disclosures regulators are now asking for.

INFRASTRUCTURE & CRYPTOGRAPHY

From Qubits to Profits: Strategic Takeaways from the Economist's 5th Annual Commercialising Quantum Global 2026 Summit

The Economist Impact 5th Annual Commercialising Quantum Global 2026 summit confirmed quantum's pivot to enterprise workflows: $1.3B raised in five months, post-quantum cryptography is a board-level fiduciary issue under SNDL harvesting, quantum sensing is shipping today for GPS-independent navigation, and HSBC's Philip Intallura delivered the directive that waiting for fault-tolerant hardware is an unforced error.

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.