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 2mo 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 2mo 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 1mo 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 1mo 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.

Office worker with voice assistant and laptop — symbolising the structured, machine-readable interbank payment messages that pacs.008 automation makes programmable
Pacs008 · ISO 20022 · Biyan Kuɗi Tsakanin Bankuna

Gina Sarrafa pacs.008 don Zamanin ISO 20022 Tsakanin Bankuna a 2026

pacs008 kayan aikin Python ne na buɗaɗɗen tushe wanda ke sa saƙonnin canja wurin kuɗin abokin ciniki na ISO 20022 FI-to-FI su zama masu shirye-shirye — adireshi mai tsari, tabbatarwa, tafiyarwa, ƙugiyoyin bin doka, da wa'adin ƙarshe na SWIFT na Nuwamba 2026 a matsayin tsoffin saiti.

Aerial view of the City of London at dusk — symbolising the post-quantum migration banks must run from NIST standards into inspectable cryptographic code
KyberLib · Ɓoyewar Bayan Ƙididdiga · Banki Mai Aminci Da Ƙididdiga

KyberLib da Ƙaurar Bankuna Bayan Ƙididdiga a 2026: Daga Matakai zuwa Lamba

KyberLib na juya ƙaurar bankuna bayan ƙididdiga daga takardar manufofi zuwa Rust da ana iya bincika — kunshe makullai na FIPS 203 ML-KEM, musafahar cakuda ta gargajiya da bayan ƙididdiga, tattarawar no_std don HSMs, iyakokin abstraction masu sassaucin ɓoyewa, da shaidar gudanarwa ta DORA Article 5 da hukumomin gudanarwa ke buƙata yanzu.

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.