Marin Ivezic

I am the Founder of Applied Quantum (AppliedQuantum.com), a research-driven consulting firm empowering organizations to seize quantum opportunities and proactively defend against quantum threats. A former quantum entrepreneur, I’ve previously served as a Fortune Global 500 CISO, CTO, Big 4 partner, and leader at Accenture and IBM. Throughout my career, I’ve specialized in managing emerging tech risks, building and leading innovation labs focused on quantum security, AI security, and cyber-kinetic risks for global corporations, governments, and defense agencies. I regularly share insights on quantum technologies and emerging-tech cybersecurity at PostQuantum.com.

Quantum Computing for Cybersecurity Professionals

Marin IvezicMay 12, 2021

Part 8: Shor: Cryptanalysis by Physics

Part 8 aims the four-move template at RSA: factoring becomes period-finding, the quantum Fourier transform reads the period through interference, and the same move takes down ECC and Diffie-Hellman. Plus the honest 2025 resource math.
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Quantum Computing for Cybersecurity Professionals

Marin IvezicMay 12, 2021

Part 7: The Shape of a Quantum Algorithm

Part 7 assembles the toolbox into the only recipe that works: prepare, imprint, interfere, measure. Deutsch's one-qubit algorithm runs the whole shape by hand, and the closing transform explains why structure is the entry fee.
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Quantum Computing for Cybersecurity Professionals

Marin IvezicMay 12, 2021

Part 6: Correlations Without a Mechanism

Part 6 defines entanglement with four amplitudes and a factorization test, grants the gloves objection its full due, then breaks it with Bell's arithmetic: a shared recipe scores one-third, the qubits score one-quarter. Nothing communicates.
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Quantum Computing for Cybersecurity Professionals

Marin IvezicMay 12, 2021

Part 5: Vast State, Narrow Door

Part 5 scales to many qubits: 2^n amplitudes of workspace behind a single n-bit measurement. Holevo's bound, the no-cloning theorem, a failed copier that entangles instead, and the long-awaited autopsy of "tries every answer at once."
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Quantum Computing for Cybersecurity Professionals

Marin IvezicMay 12, 2021

Part 4: The Impossible Coin

The keystone of the series: a two-stage device returns certainty from a perfect fair coin, classical probability proves that impossible, and four lines of arithmetic show the amplitudes colliding. Part 2's receipt comes due.
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Quantum Computing for Cybersecurity Professionals

Marin IvezicMay 12, 2021

Part 3: Quantum Amplitudes: The One New Rule

Part 3 adds the only new rule in quantum mechanics: uncertainty described by numbers that can be negative. Amplitudes, the Born rule, an honest definition of superposition, and a minus sign no single measurement can see.
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Quantum Computing for Cybersecurity Professionals

Marin IvezicMay 12, 2021

Part 2: The Classical Bit You Don’t Know Yet

Part 2 formalizes the classical bit: a definite value, probabilities that measure your ignorance, and a two-line proof that recordless mixing never un-mixes. Every belief here is true. One of them is about to matter.
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Quantum Computing for Cybersecurity Professionals

Marin IvezicMay 12, 2021

Part 1: What a Quantum Computer Is Not

The popular story of quantum computing gets the professionally important details backwards. Part 1 clears the category error, previews the cryptographic casualty list, and sets your real deadline, which arrives well before Q-Day.
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Industry

Marin IvezicMay 11, 2021

ETH Zurich and PSI Launch Joint Quantum Computing Hub

May 2021 - ETH Zurich and the Paul Scherrer Institute (PSI) opened a new joint Quantum Computing Hub dedicated to developing next-generation quantum computers. Backed by CHF 32 million from ETH, the center in canton Aargau brings together about 30…
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Post-Quantum, PQC, Quantum Security

Marin IvezicApril 16, 2021

Evaluating Tokenization in the Context of Quantum Readiness

As the quantum era approaches, organizations face the daunting task of protecting their sensitive data from the looming threat of quantum computers. These powerful machines have the potential to render traditional cryptographic methods obsolete, making it imperative to explore innovative…
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Research

Marin IvezicApril 16, 2021

Breaking RSA-2048 With 20M Noisy Qubit

An interesting paper was published on arXiv, the preprint server. Titled “How to factor 2048 bit RSA integers in 8 hours using 20 million noisy qubits,” the paper by Craig Gidney and Martin Ekerå combines previous techniques from Shor (1994),…
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Post-Quantum, PQC, Quantum Security

Marin IvezicApril 13, 2021

Quantum Computing – Looming Threat to Telecom Security

Since the early 2000s, the field of quantum computing has seen significant advancements, both in technological development and in commercialization efforts. The experimental demonstration of Shor's algorithm in 2001 proved to be one of the key catalyzing events, spurring increased…
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Post-Quantum, PQC, Quantum Security

Marin IvezicApril 3, 2021

Adiabatic Quantum Computing (AQC) and Impact on Cyber

Adiabatic Quantum Computing (AQC), and its variant Quantum Annealing, are another model for quantum computation. It's a specialized subset of quantum computing focused on solving optimization problems by finding the minimum (or maximum) of a given function over a set…
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Quantum Computing

Marin IvezicApril 2, 2021

Routing Quantum Information: SWAP, iSWAP, and Moving Qubit States

Quantum computers face a unique challenge in moving quantum information between qubits. Unlike classical bits that can be shuttled freely along wires, qubits cannot be arbitrarily copied or moved due to the no-cloning theorem. To route a qubit’s state from…
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Quantum Computing

Marin IvezicMarch 9, 2021

Surface Code Quantum Error Correction

Quantum error correction (QEC) is indispensable for building large-scale fault-tolerant quantum computers. Even today’s best qubits suffer error rates that would quickly corrupt any long calculation if left uncorrected. The principle of QEC is to encode a single logical qubit…
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