Deep Dive Series

Long-form research across quantum technology and security

Multi-article series with capstone analyses, interactive tools, and companion databases.

Getting Started With Quantum Security & PQC Migration

Getting Started With Quantum Security

A practitioner’s roadmap from mandate to migration

Predicting Q-Day

Predicting Q-Day

Frameworks, forecasts, and the real deadline

CRQC Quantum Capability Framework

CRQC Capability Framework

Nine capabilities needed to break cryptography

China's Quantum Ambition

China’s Quantum Ambition

Could Beijing win the quantum race?

Quantum Computing Companies & Roadmaps

Quantum Computing Companies

60+ hardware companies profiled and compared

Articles & Analysis

Quantum Technologies, Security & Geopolitics

Quantum Systems Integration

Quantum Systems Integration (QSI) refers to the holistic process of designing, assembling, and deploying quantum computing systems and ensuring they work seamlessly with classical systems. In simpler terms, a quantum systems integrator is like a general contractor for quantum projects ...

Chokepoints and Industrial Base Realism: What “Quantum Supply Chain Sovereignty” Actually Means

Talk of quantum sovereignty - a nation’s independent control over quantum technology - means little unless backed by tangible supply chain control. Quantum innovation relies on narrow, specialized supply chains that are globally dispersed and often fragile. Major powers have ...

Q-Day Isn’t an Outage – It’s a Confidence Crisis

Cybersecurity lore often paints Q-Day (the moment a quantum computer cracks RSA/ECC encryption) as an instant "Quantum Apocalypse" where every system gets hacked immediately. Planes falling from the sky, banks drained in seconds, an overnight digital Armageddon - if that ...

Post-Quantum Negligence: Legal Risks of Failing to Prepare for the Quantum Threat

Quantum computing is no longer a far-off hypothesis - it’s a rapidly emerging reality that could render today’s encryption obsolete. For CISOs and their boards, this means a new kind of cybersecurity crisis is on the horizon. Sensitive data that ...

Sovereignty in the PQC Era: Standards, Trust, and Crypto-Agility

Post-Quantum Cryptography (PQC) is entering the standards stage, with the U.S. National Institute of Standards and Technology (NIST) recently selecting the first quantum-resistant algorithms. However, the future of PQC will not be as straightforward as simply adopting NIST’s choices globally ...

Trust Now, Forge Later (TNFL) – The Overlooked Quantum Threat

What is "Trust Now, Forge Later" (TNFL)? Most discussions about quantum computing threats focus on “Harvest Now, Decrypt Later” (HNDL) - the idea that adversaries can collect encrypted data today and store it, hoping a future quantum computer will break ...

Quantum Readiness Is Not (Just) a Vendor Problem

In the recent IBM's “Secure the Post-Quantum Future” report 62% of executives admitted that their organization is waiting for vendors to make them quantum‑safe. In other words, they expect cloud providers, network equipment makers and software vendors to embed post‑quantum ...

Predicting Quantum Computing Winning 2025 Nobel Physics Prize

Announcements of 2025 Nobel Prize winners start tomorrow. With announcements for Nobel Prize for Physics scheduled for Tuesday 7 October. Every autumn I indulge in a guilty pleasure: browsing speculative lists of Nobel Prize contenders and trying to guess who ...

Getting Started With Quantum Security and PQC Migration

Your complete roadmap to quantum-proofing your organization — from boardroom mandate to operational crypto-agility. This practitioner-curated Deep Dive series collects the PostQuantum.com articles you need to launch and run a quantum-readiness program, organized along the lifecycle most teams actually follow: ...

The Fab’s Hidden Supply Chain: Who Really Wins If Photonic Quantum Computing Wins

In February 2025, a team of more than ninety researchers published a paper in Nature describing something the photonic quantum computing community had been waiting a decade to see: a complete quantum photonic technology stack - single-photon sources, superconducting detectors, ...

The Optical Table’s Hidden Supply Chain: Who Really Wins If Trapped-Ion Quantum Computing Wins

In September 2025, IonQ paid $1.075 billion for a company called Oxford Ionics that had built precisely one quantum computer. It wasn't the qubit count that justified the price tag. Oxford Ionics held fewer than two dozen qubits at the ...

Quantum MedBeds and Death Threats

I never write about current politics. This might be my first on this blog. In fact, for the sake of my own sanity, I’ve made a point of steering this blog and most of my day clear of politics and ...

PostQuantum.com AI Explainer

An AI tool that answers questions using a curated corpus of information from PostQuantum.com, NIST, NSA, and ENISA and other reliable sources. Ask anything related to quantum computing or quantum security.