The Hybrid State-of-Play_ How to Securely Combine Quantum and Post-Quantum Technologies

Christoph Striecks

Published Apr 30, 2025• 0 citations

Abstract

This presentation shows how to securely combine quantum and post-quantum key establishment technologies and it was presented during the event "QCI Days Athens 2025" (28-29/04/2025). The related video is available here: The Hybrid State-of-Play: How to Securely Combine Quantum and Post-Quantum Technologies

DOI: 10.5281/zenodo.17986006

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The Hybrid State-of-Play_ How to Securely Combine Quantum and Post-Quantum Technologies

Christoph Striecks

Published Apr 30, 2025• 0 citations

Publisher

Abstract

DOI: 10.5281/zenodo.17986006

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n\geqslant 2

parties, assuming that some—possibly all—network nodes have the potential to implement quantum key distribution (in pairs), while others only have access to standard technology. The protocol allows for the cooperative construction of a shared secret key from partial keys established by quantum and post-quantum solutions, which in turn can be implemented by different building blocks. We give a formal security analysis of our proposal using a hybrid security model simultaneously capturing quantum and classical actions and capabilities.