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.

AI Security

Marin IvezicMay 31, 2021

Attacks on Models That Learn While You Watch

Real-time inference and online learning are different architectures with different threat models. Where attacker-influenced data can reach a parameter update, two research groups now find that sequence decides whether poison takes hold, not volume.
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Industry

Marin IvezicMay 30, 2021

Zuchongzhi 1.0: China’s New Superconducting Processor

In May 2021, scientists at the Chinese Academy of Sciences (CAS) unveiled Zuchongzhi 1.0, a 62-qubit programmable superconducting quantum computer that set a new benchmark in the quantum computing race. Named after a 5th-century Chinese mathematician, Zuchongzhi 1.0 contains the…
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Society 5.0

Marin IvezicMay 17, 2021

Securing Society 5.0

A term first coined by the Japanese government, “Society 5.0” describes “A human-centered society that balances economic advancement with the resolution of social problems by a system that highly integrates cyberspace and physical space.” The fifth evolution of the society,…
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Policy & Sovereignty

Marin IvezicMay 15, 2021

ENISA Publishes “Post-Quantum Cryptography” Report

The European Union Agency for Cybersecurity (ENISA) has recently published a report titled “Post-Quantum Cryptography: Current State and Quantum Mitigation.” This study offers a detailed overview of the current progress in the standardization process of Post-Quantum Cryptography (PQC), crucial for…
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Quantum Computing for Cybersecurity Professionals

Marin IvezicMay 12, 2021

Part 11: Reading the Field Like a Professional

The series closes by turning ten parts of physics into working equipment: how resource estimates move, which milestones matter, the standing answers to the questions you will be asked, and the deadline that was never Q-Day.
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Quantum Computing for Cybersecurity Professionals

Marin IvezicMay 12, 2021

Part 10: The Machine Itself

Part 10 builds the machine every earlier part assumed. Decoherence is the environment measuring your qubits uninvited, error correction checks integrity without reading the data, and the number in the headline is almost never the number that matters.
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Quantum Computing for Cybersecurity Professionals

Marin IvezicMay 12, 2021

Part 9: Grover and the Honest Speedup

Part 9 covers the algorithm that attacks everything Shor cannot. Grover's quadratic speedup is real, provably optimal, and far weaker in practice than the halving figure suggests, for a reason NIST wrote into its own standards.
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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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