Sebastien Rousseau
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INFRA

Quantum computing

Hardware progress, quantum algorithms, the timeline-to-threat, and where quantum compute crosses paths with banking workloads.

25 articles

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.

APPLIED AI

Post-Quantum Payments Infrastructure: Why Banks May Replace Rather Than Retrofit Legacy Rails

Harvest-now-decrypt-later turns today's TLS-protected payment messages into tomorrow's decrypted exposure. ML-KEM and ML-DSA are an order of magnitude larger than the RSA and ECC keys legacy rails were sized for — retrofit triggers fragmentation, latency, and HSM exhaustion. The 2026 architectural decision is whether to patch or replace before the regulatory clock runs out.

APPLIED AI

Agentic Payments in Banking: Consent, Liability, and the New Payment UX in 2026

Agentic payments crossed from concept to live transaction in 2026 — Mastercard and Rabobank executed a Netherlands AI-agent payment via Agent Pay, AP2-style cryptographic mandates are emerging, and HM Treasury says payment-services regulation must adapt. The banking architecture question is consent, identity, liability, and pre-settlement evidence.

APPLIED AI

Quantum-Safe Payments: Why the Industry Must Act Now

Modern payment infrastructure relies on public-key cryptography. RSA, ECC, and Diffie-Hellman. To authenticate transactions, protect cardholder data, and secure messaging between financial…

APPLIED AI

Quantum Lattice Crypto: Bug in Chen's LWE Attack

Following my recent article on the [Challenges in Quantum Algorithms for Lattice-Based Cryptography][00], I am compelled to provide an update on the latest developments in [Yilei Chen's research…

APPLIED AI

Advancing AI with Multimodal LLMs: Insights from MM1

The integration of natural language processing and image recognition has resulted in the development of Multimodal Large Language Models (MLLMs). In their paper, Apple introduces the MM1, a…

APPLIED AI

Alien Studio: My Tech-to Art Journey in Photography

2023 was a year of profound transformation and realisation. Motivated by curiosity and a drive to innovate, I delved into cutting-edge technology, including [Rust ⧉][06], [AI ⧉][07], and [Quantum…

APPLIED AI

KyberLib: Rust CRYSTALS-Kyber for Post-Quantum

KyberLib is a Rust-based library that protects your data from the potential threat of quantum computing. Built upon the CRYSTALS-Kyber algorithm, KyberLib delivers exceptional security,…

APPLIED AI

Generative AI in 2023: How It Works, Where It Lands

Generative AI crossed from research curiosity to production deployment in 2023. GPT-4, Claude 2, Llama 2, and Mistral demonstrated that large language models could handle legal document review, code generation, and customer dialogue at human-comparable quality — raising immediate governance questions about hallucination, data leakage, and regulatory compliance in financial services.