Quantum Secure Key Exchange with Position-based Credentials (2025)
Improved analysis of how to use QPV to provide the authentication within QKD.
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- Position-Based Quantum Cryptography
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- 2026-10-10
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Quantum tagging for tags containing secret classical data (2011) doi.org
Considers QPV in the setting when the verifiers and the prover pre-share a secret. Shows that then QPV is unconditionally secure by indefinitely expanding the secret using QKD.
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Towards practical quantum position verification (2023) arxiv.org
Delves into some technical hardware details of a practical QPV implementation.
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Provides a general attack on QPV based on port-based teleportation, using an exponential amount of pre-shared EPR pairs in the number of input qubits. Also provides a QPV protocol with a provably linear lower bound.
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Practically secure quantum position verification (2021) doi.org
Gives an overview over the existing protocols at the time and mixes elements of them to obtain different variations of those protocols.
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Introduces an extra commitment step into QPV and shows that for a class of protocols, involving $f$-BB84 QPV, this makes the transmission loss irrelevant for security. Argues $f$-BB84 is a practical QPV protocol.
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Insecurity of position-based quantum cryptography protocols against entanglement attacks (2011) doi.org
Proves insecurity of QPV protocols that were previously claimed secure and studies general principle underlying entanglement attacks. Studies variations of QPV protocols based on Bell/GHZ states and shows that using eigenstates other than Pauli $X$, $Y$, $Z$ leads to protocols…
Position-Based Quantum Cryptography › Quantum Position-based Authentication: “Improved analysis of how to use QPV to provide the authentication within QKD.”