Geometry of Banach spaces: A new route towards position based cryptography (2021)

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Provides a new protocol based on applying a phase unitary depending on the classical input information. Shows an exponential lower bound under a regularity assumption on the attack, and an exponential lower bound conditioned on an, as yet, unresolved Banach space geometry…

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Position-Based Quantum Cryptography

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2026-10-10

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Position-Based Quantum Cryptography › Conjectured Exponential Lower Bound: “Provides a new protocol based on applying a phase unitary depending on the classical input information. Shows an exponential lower bound under a regularity assumption on the attack, and an exponential lower bound conditioned on an, as yet, unresolved Banach space geometry…”