Sebastien Rousseau
Hoton Sebastien Rousseau

Sebastien Rousseau

Tabbatar da makomar banki
tare da agentic AI
da post-quantum cryptography.

An gina shi don edge. An tsara shi don juriya wadda ba ta yarda da sasanci ba. Yana ƙarfafa ƙarni na gaba na biyan kuɗi a duniya.

Authored & maintained

Open source for the
future of finance.

A portfolio of Python, Rust and JavaScript libraries I created and maintain. Open source, free to use, and applied to wholesale payments, cross-border settlement, financial data and quantum-resistant cryptography.

pain001 logo. Open-source ISO 20022 payment file automation by Sebastien Rousseau
Python · Payments

pain001

A Python library that automates ISO 20022 pain.001 payment file creation from CSV or SQLite. Built for the global migration from MT/MX to structured messages across SWIFT, SEPA and major schemes.

Learn about pain001

4116Apache-2.0last commit 1mo ago

pacs008 logo. Open-source ISO 20022 pacs.008 toolkit by Sebastien Rousseau
Python · Cross-border

pacs008

Generate, validate and deliver ISO 20022 pacs.008 FI-to-FI customer credit transfer messages. JSON Schema, XSD validation, IBAN across 75 countries, GDPR/PCI-DSS-compliant PII masking.

Learn about pacs008

2Apache-2.0last commit 1mo ago

Bank Statement Parser logo. Open-source finance toolkit by Sebastien Rousseau
Python · Finance

Bank Statement Parser

A finance-grade Python toolkit that turns multi-format bank statements into structured data. Designed for the realities of real-world statement files and the audit demands of regulated environments.

Learn about Bank Statement Parser

215Apache-2.0last commit 3w ago

Hash HSH logo. Open-source Rust hash library by Sebastien Rousseau
Rust · Security

Hash (HSH)

A Rust library implementing secure hash and digest algorithms for password encryption and verification. Designed with a quantum-resistant posture for the post-PQC era of authentication.

Learn about HSH

201Apache-2.0last commit 3mo ago

KyberLib logo. Open-source Rust CRYSTALS-Kyber library by Sebastien Rousseau
Rust · Quantum

KyberLib

A robust Rust implementation of CRYSTALS-Kyber, the NIST FIPS 203 standard for general-purpose post-quantum encryption. The foundation for quantum-resistant payment authentication.

Learn about KyberLib

413last commit 3mo ago

noyalib logo. Open-source pure-Rust YAML 1.2 ecosystem by Sebastien Rousseau
Rust · YAML

noyalib

A pure-Rust YAML 1.2 ecosystem. Zero unsafe, 100% spec compliance (406 / 406 official suite), streaming-first serde, lossless CST and JSON-Schema validation. Library + CLI (noyafmt, noyavalidate) + LSP + MCP + WASM bindings.

Learn about noyalib

1Apache-2.0last commit 3w ago

“Quantum computing threatens the cryptographic foundations of financial services. Payments, from real-time to cross-border settlement, rely on protections that quantum computing will eventually render obsolete.”

Emerging Payments Association Asia (EPAA) · septembre 2025

Quantum-Safe Payments.

Industry white paper for the Emerging Payments Association Asia. The structural threat quantum computing poses to payment infrastructure, and the case for coordinated action now.

Banner illustration for the EPAA Quantum-Safe Payments white paper

EPAA · septembre 2025

Why the payments industry must act now.

Regulators are treating harvest-now-decrypt-later as a credible present risk. This paper outlines the structural threat and the urgent case for coordinated action across wholesale payment rails.

Read the white paper

Karanta sabbin bincike

From the desk.

Recent research and writing on quantum-safe cryptography, ISO 20022 migration and the future of wholesale payments.

Visual register for the wholesale-payments shift in 2026 — messaging migration giving way to programmable settlement across ISO 20022, tokenised deposits, real-time rails, and cross-border atomicity.
Biyan Kuɗi Na Wholesale · ISO 20022 · Tokenised Deposits

Index na Biyan Kuɗi na Wholesale a 2026: ISO 20022, Tokenised Deposits, Layukan Ainihin-Lokaci, da Settlement na Cross-Border

Tsarin index don auna shirin biyan kuɗi na wholesale a 2026: bin doka na structured-address na ISO 20022 kafin matakin Nuwamba 2026 na SWIFT, settlement na tokenised-deposit, atomicity na cross-border na BIS Project Agorá, jagoranci na layukan ainihin-lokaci, da ingancin ruwa. Kashi huɗu — cikar bayanan da aka tsara, mafi kyawun jagorancin layi, jinkirin settlement-finality, da rufin Agorá-corridor — suna mai da matsayin aikin biyan kuɗi shaida da ke shirye don kulawa.

Circuit-board pattern resolving into a cityscape skyline — the visual register chosen for cloud-native banking: platform-engineering primitives stitched into the bank's operational fabric.
Cloud Native Banking · DORA · Platform Engineering

Ma'aunin Banking Cloud-Native a 2026: DORA, Platform Engineering, Sovereign Cloud, da Juriya na Aiki

Shirin injiniya don banking cloud-native a matakin binciken DORA. Primitives biyar na platform engineering — hanyoyin shimfiɗa na Kubernetes, tashar Backstage, GitOps ta ArgoCD, shigarwar Open Policy Agent, OpenTelemetry daga ƙarshe zuwa ƙarshe — suna samar da shaidar rajistar Mataki 8 a gudun bututun aiki. Gwajin aiwatar da fita na shekara-shekara ga CIF masu dogaro da CTPP bisa manufofin RTO da aka samo daga BIA. An magance zaɓuɓɓukan sovereign-cloud (AWS European Sovereign Cloud, Microsoft EU Data Boundary, Bleu, Thales / S3NS) a matsayin shawarwarin injiniya, ba alama ba.

The Quantum-Safe Banking Index 2026 index diagram for banks and financial institutions in 2026
Quantum Cryptography · Post-Quantum Cryptography · QKD

Quantum-Safe Banking Index a 2026: Cryptography na Post-Quantum, QKD, Crypto-Agility, da Haɗarin Harvest-Now-Decrypt-Later

Tsarin index don auna shirin quantum-safe na banki a 2026: cryptographic bill of materials, tsarin hybrid TLS, ci gaban ƙaura zuwa NIST FIPS 203 / 204 / 205, primitives na crypto-agility, da bayyanar harvest-now-decrypt-later a bayanan sirri na dadewa. Quantum Scorecard na Allunan Gudanarwa ya bayyana kashi huɗu daidai — cikar kayyade, bayyanar HNDL, ci gaban ƙaura ta NIST, shirin crypto-agility — wanda ya mai da matsayin ayyuka zuwa shaida da ta dace da masu sa ido.

The Agentic AI Index for Banks 2026 index diagram for banks and financial institutions in 2026
Agentic AI · AI Banki · Mulkin AI

Agentic AI Index don Bankuna a 2026: Auna Cin Gashin Kai, Mulki, Ikon Binciken Audit, da Tasirin Kasuwanci

Shirin injiniya don agentic AI a bankunan tier-1: rarrabe da izini ba da hankali ba, ɗaukar kowane agent na samar a matsayin model na SR 11-7 / SS1/23 daga rana ta farko, kuma a gina control plane mai sashe biyar — service accounts da aka tsara da OAuth, semantic routing mai tabbaci, OPA policy gates, WORM audit logs marasa canjawa, da kill switch da aka gwada — wanda ke maida kwarara-aikin masu cin gashin kai zuwa shaidar da za a iya bincika.

Experience

Brands along the way.

From global Tier-1 banks to consumer technology. Payments and digital product leadership across HSBC, PayPal, Barclays, Shazam, AKQA and Virgin Group.