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Marin Ivezic

Marin Ivezic

@ivezic.bsky.social

60 followers 180 following 120 posts

Founder, AppliedQuantum.com | Former CISO, CTO, Big 4 Partner, Quantum & Cyber Entrepreneur | #Quantum, #QuantumComputing, #QuantumSecurity #QuantumResistance #PQC #QuantumAI #QuantumML #Cybersecurity #QuantumReadiness #Q-Day

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Marin Ivezic @ivezic.bsky.social · 23d

A single day with 4 breakthrough quantum tech developments - each with the potential to accelerate the arrival of Q-Day.

That’s exactly what happened on Sept 24–25.
I break it all down in the first issue of The Quantum Observer: quantumobserver.com/p/quantums-w...

#QuantumComputing #PQC #QDay

Quantum’s Wild Week

The week quantum research smashed timelines and regulators and industry organizations yelled “Move faster!”

quantumobserver.com

Marin Ivezic @ivezic.bsky.social · 23d

What a week for quantum tech! Qubits leaping ahead of schedule, Caltech scaling to 6,100, HSBC finding real quantum advantage, NIST issuing new PQC guidance - and more.

I unpack it all in the first edition of The Quantum Observer: quantumobserver.com/p/quantums-w...

#Quantum #PostQuantum #PQC

Quantum’s Wild Week

The week quantum research smashed timelines and regulators and industry organizations yelled “Move faster!”

quantumobserver.com

Marin Ivezic @ivezic.bsky.social · Sep 9

My point was - you were right. There is no law/regulation anywhere that mandates public notification of cyber incidents that impact lives, well-being, environment, or economy. Authorities often have to be notified. But never the impacted public in a way that they would be in case of a data breach.

Marin Ivezic @ivezic.bsky.social · Sep 9

2/2 …(in e.g. a manufacturing plant) were caused by a targeted cyber sabotage, the incident was recorded as an industrial accident and neither the company, law enforcement, national security agencies (not-UK)…wanted to deal with it. It’s a tough problem. So let’s pretend it doesn’t exist.

Marin Ivezic @ivezic.bsky.social · Sep 9

Ciaran, well said! I spent 20 years of my career focused on these kind of attacks on cyber-physical systems. I coined the term “cyber-kinetic attacks” in the 1990s for these kind of cyber attacks that impact lives, well-being and the environment. Even when my teams conclusively proved that deaths…

Marin Ivezic @ivezic.bsky.social · Sep 1

Fifty shades of geopolitics

Marin Ivezic @ivezic.bsky.social · Aug 30

Quantum-safe upgrades aren’t just for your encryption appliances – they’re for every system that touches crypto. This article drives home that point: nearly every enterprise system uses cryptography so almost everything will need some update for the quantum era postquantum.com/post-quantum...

Quantum Era Demands Changes to ALL Enterprise Systems

Preparing for this seismic shift is far more complex than most realize. It is not just about changes to a few systems; it requires an enterprise-wide...

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 9

The big picture: telecom execs need to see PQC migration as a strategic resilience initiative, not just a tech upgrade. It will touch everything – standards, supply chain, devices, cloud, edge. Coordination is key... #QuantumReadiness postquantum.com/post-quantum...

Telecom’s Quantum‑Safe Imperative: Challenges in Adopting Post‑Quantum Cryptography

The race is on to quantum‑proof the world’s telecom networks. With cryptographically relevant quantum computers (CRQC) projected to arrive...

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 8

The first generation of quantum code-breakers won’t be cheap to run: each RSA-2048 crack could consume tens of MWh of energy. That means only high-value targets would be worth the effort initially... #QuantumResilience postquantum.com/post-quantum...

The Enormous Energy Cost of Breaking RSA‑2048 with Quantum Computers

The energy requirements for breaking RSA-2048 with a quantum computer underscore how different the post-quantum threat is...

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 8

TL;DR from this deep-dive: transparency is security. A CBOM brings cryptography out of the shadows. Expect CBOMs to become as routine as SBOMs in audits. It’s a bit more work now for a lot more peace of mind later. #PQC #CryptoAgility postquantum.com/post-quantum...

Cryptographic Bill of Materials (CBOM) Deep-Dive

Cryptographic Bill of Materials (CBOM) represent the next evolution in software transparency and security risk management...

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 8

Why 2030 for Q-Day? 3 pieces of recent news: IBM plans ~200 logical qubits by 2029, Gidney’s 2025 paper showed ~1300 logical qubits running 1 week could factor RSA-2048, and Oxford set a record for low error rates. Put together, that makes a 2030 plausible. postquantum.com/post-quantum...

Q-Day Revisited - RSA-2048 Broken by 2030: Detailed Analysis

It’s time to mark a controversial date on the calendar: 2030 is the year RSA-2048 will be broken by a quantum computer - or the Q-Day.

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 8

CBOM (Cryptography Bill of Materials) is the new buzzword. Think SBOM but for encryption. To migrate to #PQC, you first need a map of every place cryptography lives in your org. This article shows how various tools help assemble that map. #CryptoAgility postquantum.com/post-quantum...

Cryptographic Inventory Vendors and Methodologies

Achieving a comprehensive cryptographic inventory often requires combining multiple tools and methodologies. Each solution...

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 8

Don’t rely on manual, interview-based cryptographic inventories – they’re usually incomplete and give a false sense of security. This article argues that a half-baked inventory is dangerous postquantum.com/post-quantum...

Dos & Don'ts of Crypto Inventories for Quantum Readiness

Manual, interview-based, surrvey-based, spreadsheet-based cryptographic inventories are insufficient and potentially detrimental...

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 7

Remember late 2022 when headlines screamed a Chinese research team had a new quantum algorithm that might break RSA-2048 with just 372 qubits? This article recounts that saga and current state. Spoiler: the hype got ahead of reality. postquantum.com/post-quantum...

Breaking RSA Encryption: Quantum Hype Meets Reality (2022–2025)

If you encrypted a message with an RSA-2048 public key today, no one on Earth knows how to factor it with currently available technology...

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 7

Why 2030 for Q-Day? Three pieces of recent news: IBM plans ~200 logical qubits by 2029, Gidney’s 2025 paper showed ~1300 logical qubits could factor RSA-2048, and Oxford set a record for low error rates. Put together, that makes a 2030 quantum code-breaker plausible. postquantum.com/post-quantum...

Q-Day Revisited - RSA-2048 Broken by 2030: Detailed Analysis

It’s time to mark a controversial date on the calendar: 2030 is the year RSA-2048 will be broken by a quantum computer - or the Q-Day.

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 7

No, migrating to #PQC isn’t a “one-click” software patch. In reality, it’s a years-long effort: you need to map all your crypto usage, replace algorithms across apps, devices, and protocols, and do tons of testing. There’s no “easy” button to become #QuantumResilient. postquantum.com/post-quantum...

Quantum Readiness / PQC Migration Is The Largest, Most Complex IT/OT Overhaul Ever - So Why Wait?

Quantum readiness / PQC migration is arguably the largest and most complicated digital infrastructure overhaul in history. Yes, far bigger than Y2K...

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 7

Reality check: today’s quantum hardware is small and noisy, so QML is largely experimental. The guide acknowledges limitations and suggests near-term hybrid approaches. This is a comprehensive resource to get up to speed on quantum + ML. #QuantumAI postquantum.com/quantum-ai/q...

Guide to Quantum ML for Data Scientists

Quantum Machine Learning (Quantum ML or QML) is an emerging interdisciplinary field that integrates quantum computing with traditional ML

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 7

Quantum tech = strategic autonomy for Europe. This strategy isn’t just science and industry – it’s about sovereignty. By investing in dual-use quantum and building a homegrown talent pool, the EU aims to control its destiny postquantum.com/industry-new...

Quantum Europe Strategy: Europe’s Five-Pillar Plan to Lead the Quantum Revolution

On July 2, 2025, the European Commission unveiled the Quantum Europe Strategy – a comprehensive roadmap

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 6

Quantum tech = the new space race. Governments have poured $40B+ into quantum R&D because whoever leads in quantum computing can potentially decrypt other nations’ secrets and dominate future tech industries. This article sums up how major powers approach it. postquantum.com/quantum-comp...

Quantum Geopolitics: The Global Race for Quantum Computing

Quantum computing is not just about faster computers—it represents a paradigm shift with wide-ranging geopolitical implications...

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 6

Regulators now often require a cryptographic inventory as the first step to #QuantumResilience. The article discusses layering multiple discovery methods postquantum.com/post-quantum...

How to Perform a Comprehensive Quantum Readiness Cryptographic Inventory

A cryptographic inventory is essentially a complete map of all cryptography used in an organization’s systems – and it is vital for understanding...

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 6

Boards: quantum risk isn’t just a tech problem – it’s a governance issue. Regulators increasingly hold boards accountable for cyber risks, and that extends to quantum threats. A future quantum breach could lead to major liability. #QuantumResilience postquantum.com/post-quantum...

What is the Quantum Threat? A Guide for C‑Suite Executives and Boards

Boards do not need to dive into the scientific intricacies of qubits and algorithms, but they do need to recognize that this is an important risk...

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 6

Quantum computers harness superposition, entanglement, and interference – basically doing many calculations at once and interfering paths to amplify correct answers. Not every problem is a good fit, but for certain problems the speedups are astronomical postquantum.com/quantum-comp...

What Quantum Computers Can Do Better Than Classical Computers

Quantum computers already outperform classical computers on a few specialized tasks, and over the coming years that list of tasks will grow...

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 6

Quantum computing is being called the master key that could unlock nearly all of today’s encrypted data. In other words, a sufficiently powerful quantum computer poses a universal cyber threat more serious than anything before. Boards and CEOs can’t afford to ignore postquantum.com/post-quantum...

What is the Quantum Threat? A Guide for C‑Suite Executives and Boards

Boards do not need to dive into the scientific intricacies of qubits and algorithms, but they do need to recognize that this is an important risk...

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 5

Bottom line: has anyone come close to cracking RSA-2048 with quantum? Not really – it’s still a theoretical threat. The “48-bit factoring” hype taught us that claims of “RSA broken” will surface periodically and we need to critically evaluate them. postquantum.com/post-quantum...

Breaking RSA Encryption: Quantum Hype Meets Reality (2022–2025)

If you encrypted a message with an RSA-2048 public key today, no one on Earth knows how to factor it with currently available technology...

postquantum.com

Marin Ivezic @ivezic.bsky.social · Aug 5

Canada’s PQC roadmap means business: by 2026 every federal agency must inventory its crypto use and designate a lead for the transition. Annual progress reports will be mandated. Essentially, they’re baking #QuantumReadiness accountability into government operations. postquantum.com/industry-new...

Government of Canada Launches Post-Quantum Cryptography (PQC) Migration Roadmap

On June 23, 2025 Canada has issued a new roadmap for migrating the Government of Canada’s IT systems to post-quantum cryptography (PQC).

postquantum.com