Sebastien Rousseau
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Sebastien Rousseau

Articles on AI, post-quantum cryptography, ISO 20022 and the future of payments.

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Six-pillar cloud architecture diagram for 2026 — AI-native, multi-cloud, serverless, edge, DevSecOps, and sustainable design, with CloudCDN edge research overlay
Cloud · AI-Native · Post-Quantum

The Best Cloud Infrastructure Architecture in 2026: An AI-Native, Multi-Cloud, Quantum-Aware Blueprint for Financial Services

· Sebastien Rousseau

Cloud architecture has crystallised around six pillars and one strategic question for banks: whether to consume cloud or design it — under converging pressure from agentic commerce, agentic unit economics, harvest-now-decrypt-later quantum risk, MCP security, cryptographic agent identity, and the legacy estate that still consumes 70–75% of financial-services IT spend.

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Cross-border payment message structured-address diagram with TwnNm and Ctry highlighted
ISO 20022 · Payments · CBPR+

The novembre 2026 pacs.008 Structured-Address Deadline: A Six-Month View

· Sebastien Rousseau

From novembre 2026, SWIFT CBPR+ rejects unstructured postal addresses in cross-border payment messages. Six months out, 65% of pacs.008 messages still ship non-compliant addresses and 44% of banks remain behind on the remediation programme.

Quantum computing circuit board with blue light patterns
Quantum

Quantum Thresholds Are Moving Again

· Sebastien Rousseau

A new paper suggests Shor's algorithm could run on as few as 10,000 qubits. The threshold for cryptographically relevant quantum computing is dropping fast.

The DTT (DateTime) Rust library logo
Open source · Rust

Efficient Date and Time Management with DateTime (DTT)

· Sebastien Rousseau

DateTime (DTT) is a comprehensive Rust library for parsing, validating, manipulating, and formatting dates and times. With high precision and broad functionality.

Turned-off laptop computer on top of a white table
Open source · Rust

Static Site Generator: the fastest Rust-based SSG

· Sebastien Rousseau

Empowering you to create high-impact static websites with infinite possibilities, limitless scalability, and a truly unique web presence that you control.

Computer and mobile screens with trades
Blockchain

Understanding the Technology behind Blockchain

· Sebastien Rousseau

Building a cryptocurrency on the Ethereum Blockchain: a comprehensive guide to blockchain development, tokenisation and cryptocurrency implementation.