Sebastien Rousseau
Àwòrán Sebastien Rousseau

Sebastien Rousseau

Dídáàbò bo ọjọ́ọjọ́ ifowopamọ́
pẹ̀lú àkànpọ̀ AI
àti ìfọ̀rọ̀-ìkọ̀kọ̀ lẹ́yìn-quantum.

A kọ́ ọ́ fún edge. A ṣe e fún ìfaradà tí kò ní ìbámu. Ń ru ìran tókàn ti ìsanwó kárí ayé sókè.

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

Ka ìwádìí tuntun

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.
Ìsanwó Ńlá · ISO 20022 · Tokenised Deposits

Àkójọ-Ìwọ̀n Ìsanwó Ńlá ní 2026: ISO 20022, Tokenised Deposits, Ọ̀nà Àkókò-Gangan, àti Ìpinnu Kọjá-Ààlà

Àkójọ-ìwọ̀n láti wọn ìmúrasílẹ̀ ìsanwó ńlá ní 2026: ìbámu àdírẹ́sì-ìṣèlú ISO 20022 ṣáájú àkókò November 2026 ti SWIFT, ìpinnu tokenised-deposit, àtòpọ̀ BIS Project Agorá kọjá-ààlà, ìṣàkóso ọ̀nà àkókò-gangan, àti ìmúdára owó-rírọ̀. Ìpín mẹ́rin gangan — ìpé data-ìṣèlú, ìṣàṣèyọrí ìṣàkóso ọ̀nà, àkókò-ìpari ìpinnu, àti ìbo ọ̀nà-Agorá — yí ipò ìṣiṣẹ́-ìsanwó padà sí ẹ̀rí tó ṣetán fún àbójútó.

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

Atọ́ka Bánkì Ọlọ́nà-Àwọsánmà ní 2026: DORA, Platform Engineering, Àwọsánmà Alágbára, àti Ìfaradà Iṣẹ́

Àpẹrẹ ẹ̀rọ fún bánkì ọlọ́nà-àwọsánmà ní ìpele àbójútó DORA. Àwọn ìpilẹ̀ platform-engineering márùn — paved roads Kubernetes, Backstage portal, GitOps nípasẹ̀ ArgoCD, admission Open Policy Agent, OpenTelemetry láti ibẹ̀rẹ̀ dé òpin — ṣe ẹ̀rí àkójọpọ̀ DORA Article 8 ní iyara pipeline. Àwọn àdánwò ìjáde tí a ṣe lọ́dọọdún fún àwọn CIF tó dá lórí CTPP lórí àfojúsùn RTO tó wá látinú BIA. Àwọn àṣàyàn àwọsánmà alágbára (AWS European Sovereign Cloud, Microsoft EU Data Boundary, Bleu, Thales / S3NS) gẹ́gẹ́ bí ìpinnu ẹ̀rọ, kì í ṣe àmì òwò.

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

Atọ́ka Bánkì Aláàbò-Quantum ní 2026: Cryptography Lẹ́yìn-Quantum, QKD, Crypto-Agility, àti Ewu Harvest-Now-Decrypt-Later

Ètò atọ́ka fún wíwọn ìmúrasílẹ̀ bánkì aláàbò-quantum ní 2026: bill of materials cryptographic, ìfiránṣẹ́ TLS hybrid, ìtẹ̀síwájú ìṣíkiri NIST FIPS 203 / 204 / 205, àwọn ìpilẹ̀ crypto-agility, àti ìfihàn harvest-now-decrypt-later lórí data ìkọ̀kọ̀ tó pẹ́. Scorecard Quantum Ipele-Board ṣàlàyé ìpín mẹ́rin gangan — ìpé àkójọ, ìfihàn HNDL, ìtẹ̀síwájú ìṣíkiri NIST, ìmúrasílẹ̀ crypto-agility — tí ó yí ipò àwọn iṣẹ́-akanṣe padà sí ẹ̀rí tí ó ṣetán fún àbójútó.

The Agentic AI Index for Banks 2026 index diagram for banks and financial institutions in 2026
Agentic AI · AI Bánkì · Ìṣàkóso AI

Atọ́ka Agentic AI fún Àwọn Bánkì ní 2026: Dídiwọ̀n Ìṣọmọ̀dáṣe, Ìṣàkóso, Agbára Àyẹ̀wò, àti Ipa Ìṣòwò

Àwòrán ẹ̀rọ fún agentic AI nínú àwọn bánkì ipele-kìíní: ṣe ìpín nípa àwọn àṣẹ kìí ṣe nípa ọgbọ́n, kà gbogbo agent tí ó wà nínú iṣẹ́ gẹ́gẹ́ bí àwòrán SR 11-7 / SS1/23 láti ọjọ́ kìn-ín-ní, kí o sì kọ́ control plane onípín márùn-ún — àwọn service account tí OAuth ti ní ààlà, semantic routing tí a lè sọ àsọtẹ́lẹ̀, àwọn ẹnu-ọ̀nà ìlànà OPA, àwọn audit log WORM tí a kò lè yí padà, àti kill switch tí a ti dán wò — tí ó ń yí àwọn àbáṣe adáṣe padà sí ẹ̀rí tí a lè ṣàyẹ̀wò.

An editorial aerial composition by Miguel Sousa suggesting interlocking systems — the visual register chosen for a board-level dashboard view of the 2026 Banking Infrastructure Index
Ohun Èlò Báńkì · Agentic AI · Cryptography Quantum

Atọ́ka Ohun Èlò Báńkì 2026: Wíwọn Ìmúrasílẹ̀ fún AI Aládàádúró, Ààbò Ọba-Aláṣẹ-Quantum, Ìfaradà Orígínal-Àwọsánmà, àti Ìsanwó Olówó-Ńlá

Ohun èlò báńkì ní 2026 ti dé ojú àkókò tó nílò atọ́ka, kì í ṣe àkójọ àṣà mìíràn. Àpẹẹrẹ àwòkọ́ṣe Stanford AI Index fún wíwọn ìmúrasílẹ̀ báńkì kọjá AI aládàádúró, ààbò ọba-aláṣẹ-quantum, ìfaradà orígínal-àwọsánmà, àti ìsanwó olówó-ńlá — wíwọn gẹ́gẹ́ bí ètò ìṣiṣẹ́ kan.

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.