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Gdańsk conference hears Quantum B on post-quantum security

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September 15, 2026 by Ivy Delaney

Paweł Kowalik, Financial & Project Manager at Quantum B, warned companies about an approaching deadline for post-quantum security preparations while speaking at the Q-Con Quantum Conference 2026 in Gdańsk on September 10-11. Kowalik addressed “Q-Day,” the moment a quantum computer could compromise current encryption methods, framing the issue as a ticking clock for product development. He explained that building security into products from the design stage avoids later, costly changes. The Q-Con programme highlighted the growing need for quantum solutions across sectors including cybersecurity, finance, and critical infrastructure.

Paweł Kowalik Defines “Q-Day” and Post-Quantum Security Risks

Quantum B used the Startup Meetup: Quantum & Space and Q-Con Quantum Conference 2026, held September 10-11 in Gdańsk, to emphasize the urgency of preparing for post-quantum security threats. Q-Day signifies the moment a quantum computer possesses the capability to compromise currently used encryption methods, potentially exposing sensitive data and undermining digital trust. Kowalik detailed the implications for companies still in the product development phase, explaining that integrating post-quantum security at the design stage offers a more efficient path than retrofitting systems later.

He cautioned that delaying these measures could result in significant and complex alterations to existing infrastructure. The Q-Con programme reflected this broad concern, with sessions dedicated to quantum applications spanning cybersecurity, finance, and even space technologies.

The conference programme highlighted the diverse range of sectors anticipating disruption from quantum computing, including critical infrastructure and dual-use solutions. Kowalik stated that “Q-Day refers to the point at which a cryptographically relevant quantum computer could break some of the cryptographic methods widely used today,” underscoring the potential for decryption, impersonation, and erosion of confidence in digital signatures. This concentrated focus on proactive security measures signals a shift toward anticipating, rather than reacting to, the quantum threat.

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Ivy Delaney

Ivy Delaney has been working with neural networks and machine learning since the mid-nineties, back when a couple of hidden layers and a long afternoon of training counted as ambitious. She has watched the field go from academic curiosity to the thing quietly running underneath everything, and she brings that long view to quantum computing. For Quantum Zeitgeist she covers the ground where the two fields meet. That means quantum machine learning and the variational algorithms it leans on, and it also means the less glamorous but more interesting story of classical machine learning already doing real work inside quantum machines, decoding error-correcting codes, calibrating noisy hardware and learning the error models that simulators depend on. She writes about the hardware those algorithms have to run on too, and about the post-quantum cryptography scramble that the same hardware has set off. Her stories typically start with the paper, whether that is peer-reviewed work, conference proceedings or an arXiv preprint, with the source linked so you can hold a claim up against the research it came from. She is unimpressed by benchmarks that will not say what they beat, and by demonstrations that only work in the press release.

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